Question 1

An X-linked carrier is a ____.​

Accepted Answer

An X-linked carrier is a female who carries one copy of a recessive allele on her X chromosome. She is heterozygous for the allele and can still pass it on to her offspring.

Question 2

In an autosomal dominant disorder such as Huntington's disease, two carrier parents have the probability of passing the gene onto ____ of their children.

Accepted Answer

The answer of In an autosomal dominant disorder such as...

Question 3

Six fingers on one hand would be classified as a(n) ____.​

Accepted Answer

Six fingers on one hand is classified as a genetic abnormality, specifically known as polydactyly, which is a condition where an individual has more than the usual number of fingers or toes.

Question 4

The process by which chromosomes fail to separate during meiosis is called ____.​

Accepted Answer

Nondisjunction is the process during meiosis when chromosomes fail to separate properly, leading to gametes with an abnormal number of chromosomes.

Question 5

In Siamese cats, enzymes that code for dark fur color are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of ____.

Accepted Answer

This is an example of environmental effects because the expression of the genes for fur color in Siamese cats is influenced by the temperature of their environment.

Question 6

____ is an example of a genetic disorder with little impact on the individual.​

Accepted Answer

XXX syndrome, also known as Trisomy X, often has little or no impact on the individual, with many women leading normal lives without significant health issues.

Question 7

In a pedigree chart, a male who demonstrates the trait being studied is represented by a ____.​

Accepted Answer

In a pedigree chart, males are represented by squares and females by circles. A darkened shape indicates that the individual demonstrates the trait being studied. Therefore, a male who demonstrates the trait is represented by a darkened square.

Question 8

The switching between asexual and sexual reproduction by water fleas is controlled by ____.​

Accepted Answer

The switching between asexual and sexual reproduction in water fleas is controlled by environmental effects. When conditions are favorable, water fleas reproduce asexually, but they switch to sexual reproduction when environmental conditions become challenging, as it increases genetic diversity and potentially the survival of their offspring.

Question 9

Matching
Match the following terms to the description with which they best correspond.
-​condition in which one allele is not fully dominant over another; the heterozygous phenotype appears to be a blend of the two homozygous phenotypes
A)genotype
B)heterozygous
C)dihybrid cross
D)pleiotropic
E)codominance
F)epistasis
G)incomplete dominance
H)syndrome
I)continuous variation
J)aneuploidy

Accepted Answer

The answer of Matching
Match the following terms to the description...

Question 10

Amniocentesis involves sampling ____.

Accepted Answer

Amniocentesis is a medical procedure used in prenatal diagnosis of chromosomal abnormalities and fetal infections, where a small amount of amniotic fluid, which contains fetal tissues, is sampled from the amnion or amniotic sac surrounding a developing fetus.

Question 11

In a pedigree chart, a female showing the specific trait being studied is indicated by a ____.​

Accepted Answer

In pedigree charts, females are represented by circles and males by squares. A darkened shape indicates that the individual exhibits the specific trait being studied. Therefore, a darkened circle represents a female showing the specific trait.

Question 12

Human eye color is an example of a trait that varies ____.​

Accepted Answer

Human eye color is a polygenic trait, meaning it is controlled by multiple genes, resulting in a continuous range of variations rather than distinct categories.

Question 13

Face length in dogs is controlled by ____.​

Accepted Answer

The answer of Face length in dogs is controlled by...

Question 14

Matching
Match the following terms to the description with which they best correspond.
-​refers to a gene whose product influences multiple genes
A)genotype
B)heterozygous
C)dihybrid cross
D)pleiotropic
E)codominance
F)epistasis
G)incomplete dominance
H)syndrome
I)continuous variation
J)aneuploidy

Accepted Answer

The answer of Matching
Match the following terms to the description...

Question 15

Males are more commonly affected by X-linked recessive genetic disorders than females because ____.​

Accepted Answer

Males have only one X chromosome, which means any recessive allele on that chromosome will be expressed, as there is no corresponding allele on the Y chromosome to potentially mask it. Females, with two X chromosomes, would need two copies of the recessive allele to express the trait.

Question 16

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.

Accepted Answer

When both parents are carriers of an autosomal recessive disorder, there is a 75% chance of producing a child who is either a carrier or not affected at all, and a 25% chance of producing a child with the disorder. This is because each child has a 25% chance of inheriting two recessive alleles (one from each parent), a 50% chance of being a carrier like the parents (inheriting one recessive allele), and a 25% chance of inheriting two dominant alleles, resulting in not having the disorder. Therefore, the probability of producing a normal (either not affected or a carrier) child is 75%.

Question 17

An autosomal recessive disorder ____.​

Accepted Answer

Autosomal recessive disorders require both parents to be carriers of the gene for the disorder. This is because an individual must inherit two copies of the recessive allele (one from each parent) to express the disorder.

Question 18

Geneticists use ____ to study the genetics of families through generations.​

Accepted Answer

Pedigrees are diagrams used by geneticists to trace the inheritance of specific traits through generations in families, allowing them to analyze patterns of inheritance and predict genetic disorders.

Question 19

Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I. Of the resulting sperm, ____.​

Accepted Answer

Nondisjunction during anaphase II of meiosis results in two normal sperm (with the correct number of chromosomes) and two abnormal sperm: one with an extra chromosome and one missing a chromosome. This is because the chromosomes fail to separate properly, leading to one gamete with an additional chromosome and one with one less.

Question 20

Genetic testing by ____ can be performed earliest in pregnancy.​

Accepted Answer

The answer of Genetic testing by ____ can be performed...

Quiz 10: Patterns of Inheritance

An X-linked carrier is a ____.

In an autosomal dominant disorder such as Huntington's disease, two carrier parents have the probability of passing the gene onto ____ of their children.

Six fingers on one hand would be classified as a(n) ____.

The process by which chromosomes fail to separate during meiosis is called ____.

In Siamese cats, enzymes that code for dark fur color are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of ____.

____ is an example of a genetic disorder with little impact on the individual.

In a pedigree chart, a male who demonstrates the trait being studied is represented by a ____.

The switching between asexual and sexual reproduction by water fleas is controlled by ____.

Amniocentesis involves sampling ____.

In a pedigree chart, a female showing the specific trait being studied is indicated by a ____.

Human eye color is an example of a trait that varies ____.

Face length in dogs is controlled by ____.

Matching Match the following terms to the description with which they best correspond. -refers to a gene whose product influences multiple genes A)genotype B)heterozygous C)dihybrid cross D)pleiotropic E)codominance F)epistasis G)incomplete dominance H)syndrome I)continuous variation J)aneuploidy

Males are more commonly affected by X-linked recessive genetic disorders than females because ____.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.

An autosomal recessive disorder ____.

Geneticists use ____ to study the genetics of families through generations.

Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I. Of the resulting sperm, ____.

Genetic testing by ____ can be performed earliest in pregnancy.

Quiz 10: Patterns of Inheritance

An X-linked carrier is a ____.​

In an autosomal dominant disorder such as Huntington's disease, two carrier parents have the probability of passing the gene onto ____ of their children.

Six fingers on one hand would be classified as a(n) ____.​

The process by which chromosomes fail to separate during meiosis is called ____.​

In Siamese cats, enzymes that code for dark fur color are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of ____.

____ is an example of a genetic disorder with little impact on the individual.​

In a pedigree chart, a male who demonstrates the trait being studied is represented by a ____.​

The switching between asexual and sexual reproduction by water fleas is controlled by ____.​

Amniocentesis involves sampling ____.

In a pedigree chart, a female showing the specific trait being studied is indicated by a ____.​

Human eye color is an example of a trait that varies ____.​

Face length in dogs is controlled by ____.​

Males are more commonly affected by X-linked recessive genetic disorders than females because ____.​

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.

An autosomal recessive disorder ____.​

Geneticists use ____ to study the genetics of families through generations.​

Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I. Of the resulting sperm, ____.​

Genetic testing by ____ can be performed earliest in pregnancy.​

An X-linked carrier is a ____.

Six fingers on one hand would be classified as a(n) ____.

The process by which chromosomes fail to separate during meiosis is called ____.

____ is an example of a genetic disorder with little impact on the individual.

In a pedigree chart, a male who demonstrates the trait being studied is represented by a ____.

The switching between asexual and sexual reproduction by water fleas is controlled by ____.

In a pedigree chart, a female showing the specific trait being studied is indicated by a ____.

Human eye color is an example of a trait that varies ____.

Face length in dogs is controlled by ____.

Males are more commonly affected by X-linked recessive genetic disorders than females because ____.

An autosomal recessive disorder ____.

Geneticists use ____ to study the genetics of families through generations.

Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I. Of the resulting sperm, ____.

Genetic testing by ____ can be performed earliest in pregnancy.