Question 1

Mendel's hypotheses regarding inheritance in peas were generally accepted when he published them in 1865.

Accepted Answer

Mendel's hypotheses were not widely accepted until several decades after his initial publication. It wasn't until the early 1900s, when other scientists rediscovered his work and began to confirm his conclusions, that Mendel's laws of inheritance gained widespread acceptance.

Question 2

If the influence of two alleles is fully displayed in the heterozygote without being diminished by the presence of the other allele or being suppressed by a dominant allele,the two alleles are said to be ________.

Accepted Answer

The answer of If the influence of two alleles is...

Question 3

If both copies of a given gene in an organism are identical,the organism is homozygous for that trait.

Accepted Answer

Homozygosity refers to having two identical copies of a given gene.

Question 4

Experiments involving small numbers of offspring give more reliable results than experiments observing large numbers of offspring.

Accepted Answer

Experiments involving large numbers of offspring generally give more reliable results than experiments with small numbers of offspring, because the larger sample size reduces the effect of random variation and increases statistical power.

Question 5

There are no known exceptions to Mendel's law of independent assortment.

Accepted Answer

Mendel's law of independent assortment does have exceptions, such as linked genes that are close together on the same chromosome and therefore do not assort independently in meiosis. Additionally, certain epistatic interactions between genes can also violate the law of independent assortment.

Question 6

When a ________ variety of a plant is self-fertilized,all of its offspring have the same phenotype as the parent.

Accepted Answer

The answer of When a ________ variety of a plant...

Question 7

When gametes are formed,the separation of alleles for one gene is unrelated to the separation of alleles for other genes.This idea is known as Mendel's law of ________.

Accepted Answer

The answer of When gametes are formed,the separation of alleles...

Question 8

Chromosomes are located on genes.

Accepted Answer

Genes are located on chromosomes, not the other way around.

Question 9

During meiosis,two copies of a gene separate and end up in different ________.

Accepted Answer

The answer of During meiosis,two copies of a gene separate...

Question 10

A genetic cross in which the heterozygous phenotype is intermediate between the two homozygous phenotypes is an example of ________.

Accepted Answer

The answer of A genetic cross in which the heterozygous...

Question 11

The I^Aand I^B alleles involved in human blood type differ in that they attach different ________ to the surface of red blood cells.

Accepted Answer

The answer of The I^Aand I^B alleles involved in...

Question 12

Humans exhibit a variety of physical,biochemical,and behavioral characteristics that are based on their DNA sequences.

Accepted Answer

This statement is true. The DNA sequence of an individual determines their physical traits, such as eye color and height, as well as their biochemical characteristics, such as blood type and susceptibility to certain diseases. It can also influence behavioral traits, such as personality and intelligence.

Question 13

The first reaction in the chain of enzyme-catalyzed chemical reactions that convert the amino acid tyrosine into eumelanin or pheomelanin is orchestrated by an enzyme encoded by the C gene.This enzyme is called ________.

Accepted Answer

The answer of The first reaction in the chain of...

Question 14

The first reaction in the chain of enzyme-catalyzed chemical reactions that convert the amino acid tyrosine into eumelanin or pheomelanin is orchestrated by an enzyme encoded by the C gene.Homozygotes for the recessive allele of this gene (cc)exhibit the ________ phenotype.

Accepted Answer

The answer of The first reaction in the chain of...

Question 15

New alleles arise as a result of independent assortment during meiosis.

Accepted Answer

New alleles arise through mutations in the DNA sequence, not through independent assortment. Independent assortment refers to the random distribution of chromosomes to gametes during meiosis, which contributes to genetic variation but does not create new alleles.

Question 16

Before Gregor Mendel,it was believed that offspring should be intermediate in phenotype to their two parents and that it should be impossible for "lost" traits to reappear in later generations.This idea was known as ________ inheritance.

Accepted Answer

The answer of Before Gregor Mendel,it was believed that offspring...

Question 17

In the following Punnett square,the genotypes inside the boxes (a few are indicated by arrows here)represent the number and type of offspring that a given pair of individuals will produce when mated.

Accepted Answer

The answer of In the following Punnett square,the genotypes inside...

Question 18

By observing the offspring in a series of pea-breeding experiments,Gregor Mendel deduced the laws of ________.

Accepted Answer

The answer of By observing the offspring in a series...

Question 19

A genetic cross is used to produce organisms from species that would not normally interbreed.

Accepted Answer

A genetic cross involves breeding organisms that are of the same or closely related species to study the inheritance of traits. Organisms from different species that would not naturally interbreed cannot be produced through genetic crosses. However, techniques such as genetic engineering can be used to introduce traits from one species into another.

Question 20

The plant shown in the following image would be considered a hybrid.

Accepted Answer

The answer of The plant shown in the following image...

Quiz 9: Patterns of Inheritance