Question 1

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-How many chromosomes does each somatic cell have in a human male who has two X chromosomes?

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 2

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-A small region of a protein from three species is sequenced and found to be as follows:
species X is alanine, valine, threonine, alanine
species Y is alanine, glycine, threonine, alanine
species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Z is most likely due to this.

Accepted Answer

The answer of Classification.Select the best process listed below for...

Question 3

Matching.Match the cause with the disorder.
a.autosomal recessive inheritance; lactose metabolism is blocked
b.nondisjunction of the twenty-first chromosomal pair
c.X-linked recessive inheritance
d.nondisjunction of the sex chromosomes
-hemophilia A

Accepted Answer

Hemophilia A is caused by X-linked recessive inheritance, meaning the gene mutation causing the disorder is on the X chromosome. This means males are more commonly affected, as they only have one X chromosome.

Answer: A 
 The disorder caused by autosomal recessive inheritance resulting in abnormally low melanin levels is albinism.

Answer: B 
 Nondisjunction of the twenty-first chromosomal pair results in Down syndrome, which is characterized by intellectual disability and distinct facial features.

Answer: D 
 Nondisjunction of the sex chromosomes can result in disorders such as Turner syndrome (XO) or Klinefelter syndrome (XXY). These disorders can cause a range of physical and developmental symptoms.

Question 4

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-How many chromosomes are present in each cell of the germ cell line for a tetraploid species where its normal complement of chromosomes is 48?

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 5

Matching.Match the cause with the disorder.
a.autosomal recessive inheritance; lactose metabolism is blocked
b.nondisjunction of the twenty-first chromosomal pair
c.X-linked recessive inheritance
d.nondisjunction of the sex chromosomes
-red-green color blindness

Accepted Answer

Red-green color blindness is primarily caused by a genetic mutation on the X chromosome, resulting in X-linked recessive inheritance. This means that the disorder is more commonly seen in males, who have only one X chromosome, and can inherit the mutation from their carrier mother.

The other answer choices do not match the disorder:
A) Abnormally low melanin levels can cause albinism, not color blindness.
B) Nondisjunction of the twenty-first chromosomal pair results in Down syndrome, not color blindness.
D) Nondisjunction of the sex chromosomes can result in conditions like Klinefelter syndrome or Turner syndrome, but not color blindness.

Question 6

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-Homologous sets of genes ABCDEF and aBCdEF are located on nonhomologous chromosomes.Crossing over between them is suppressed because their locations are the result of this.

Accepted Answer

The situation described is characteristic of a translocation, which involves the exchange of segments between non-homologous chromosomes. In this case, there is a translocation of a homologous set of genes between non-homologous chromosomes, and crossing over between them is suppressed.

Question 7

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-This disorder is an autosomal recessive disorder.

Accepted Answer

Galactosemia is an autosomal recessive disorder where the body is unable to break down galactose, a type of sugar found in lactose (milk sugar). This causes a buildup of toxins in the body that can lead to serious health problems if not treated.

Turner syndrome is a genetic disorder that affects females, caused by a missing or partially missing X chromosome. Progeria is a rare genetic disorder that causes premature aging. Hemophilia A is an X-linked recessive disorder affecting blood clotting. Down syndrome is a chromosomal disorder caused by the presence of an extra copy of chromosome 21.

Question 8

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-The nucleotide sequences of homologous regions of DNA of two species are AATGCCCCGTTA and AATGCCCCGCTTA.If this is not the result of a nucleotide base-pair addition, then it is most likely the result of this.

Accepted Answer

The difference between the two sequences is only one nucleotide, which suggests that a single base has been deleted from one of the sequences.

Question 9

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-Homologous sets of genes ABCDEF and AEDCBF are located on homologous chromosomes.Crossing over between them is suppressed because of this.

Accepted Answer

The answer of Classification.Select the best process listed below for...

Question 10

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Accepted Answer

Turner syndrome is caused by an absence or abnormality of one of the X chromosomes, often due to nondisjunction during meiosis. This leads to a deficiency of certain hormones, resulting in physical and developmental abnormalities.

Question 11

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-This disorder is also known as trisomy 21.

Accepted Answer

Down syndrome is also known as trisomy 21, as it is caused by an extra copy of chromosome 21. Tay-Sachs disease is caused by a deficiency in an enzyme called hexosaminidase A, Turner syndrome involves a missing or partially missing X chromosome, Progeria is a rare genetic disorder that causes premature aging, and Hemophilia A is a bleeding disorder caused by a deficiency in clotting factor VIII.

Question 12

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-This disorder is an X-linked recessive trait.

Accepted Answer

Hemophilia A is an X-linked recessive disorder, meaning it is caused by a gene mutation on the X chromosome and is more commonly seen in males.

A) Tay-Sachs disease is an autosomal recessive disorder, not X-linked.
B) Turner syndrome is not X-linked, but rather a chromosomal disorder where an individual only has one X chromosome and no Y chromosome.
C) Progeria is a rare genetic disorder caused by a mutation in the LMNA gene, and is not X-linked.
E) Down syndrome is caused by a chromosomal abnormality, typically having an extra copy of chromosome 21, and is not X-linked.

Question 13

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-The normal sperm cell of species X carries 11 chromosomes.Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomesand the remainder will have how many chromosomes?

Accepted Answer

Nondisjunction in secondary spermatocytes leads to sperm with either an extra chromosome (12) or one less (10). Fertilizing a normal ovum (11 chromosomes) results in zygotes with either 23 or 21 chromosomes.

Question 14

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?

Accepted Answer

A child born with Down syndrome (trisomy 21) has an extra copy of chromosome 21, resulting in a total of 47 chromosomes in their somatic cells (compared to the normal 46). Therefore, the correct answer is E, 47. Choices A, B, and C are incorrect as they have less than 46 chromosomes.

Question 15

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-A small region of a protein from three species is sequenced and found to be as follows:
species X is alanine, glycine, glycine, threonine, alanine
species Y is alanine, glycine, threonine, alanine
species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Y is most likely due to this.

Accepted Answer

The answer of Classification.Select the best process listed below for...

Question 16

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-Following a gene duplication event involving only five loci, how many chromosomes will a human female have?

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 17

Matching.Match the cause with the disorder.
a.autosomal recessive inheritance; lactose metabolism is blocked
b.nondisjunction of the twenty-first chromosomal pair
c.X-linked recessive inheritance
d.nondisjunction of the sex chromosomes
-Turner syndrome

Accepted Answer

Turner syndrome is caused by nondisjunction of the sex chromosomes, leading to a female typically having only one X chromosome instead of two.

Question 18

Matching.Match the cause with the disorder.
a.autosomal recessive inheritance; lactose metabolism is blocked
b.nondisjunction of the twenty-first chromosomal pair
c.X-linked recessive inheritance
d.nondisjunction of the sex chromosomes
-galactosemia

Accepted Answer

Galactosemia is an autosomal recessive disorder in which there is a blockage in the metabolism of lactose, leading to the accumulation of galactose in the bloodstream.

Answer: B
 Down syndrome is caused by the nondisjunction of the twenty-first chromosomal pair. This leads to the presence of an extra copy of chromosome 21 in the individual.

Answer: C
 Hemophilia is an X-linked recessive disorder caused by mutations in the genes responsible for producing clotting factors in the blood.

Answer: D
 Turner syndrome is caused by the nondisjunction of the sex chromosomes, leading to the absence of one copy of the X chromosome in females.

Question 19

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-An X-linked recessive gene (c) produces red-green color blindness.A normal woman whose father was color blind marries a color-blind man.
(a)
What are the possible genotypes for the mother of the color-blind man?
(b)
What are the possible genotypes for the father of the color-blind man?
(c)
What are the chances that the first son will be color blind?
(d)
What are the chances that the first daughter will be color blind?

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Question 20

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-For this disorder, both a phenotypic cure and a genotypic cure are potentially possible.

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Quiz 14: Chromosomes and Human Inheritance

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -How many chromosomes does each somatic cell have in a human male who has two X chromosomes?

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -hemophilia A

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -How many chromosomes are present in each cell of the germ cell line for a tetraploid species where its normal complement of chromosomes is 48?

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -red-green color blindness

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is an autosomal recessive disorder.

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is also known as trisomy 21.

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is an X-linked recessive trait.

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -Following a gene duplication event involving only five loci, how many chromosomes will a human female have?

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -Turner syndrome

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -galactosemia

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -For this disorder, both a phenotypic cure and a genotypic cure are potentially possible.