Question 1

The inheritance of human traits is predictable because the genes controlling them exhibit the principles of both ____________________ and ____________________.

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Question 2

In pedigrees, a male individual is symbolized as a ____________________.

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Question 3

In crosses involving complete dominance, the F₂ genotypic ratio is 1:2:1 and is expressed as a phenotypic ratio of ____________________.

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Question 4

Originally, many geneticists thought that dominant traits were caused by the presence of a gene and a recessive trait by the absence of the gene. Evaluate this idea, giving evidence for and against this proposal.

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Question 5

Given the existence of incomplete dominance and codominance, what does it really mean when it is said that a trait is dominant?

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Question 6

A cross between two individuals who differ with respect to two gene pairs is a ____________________ cross.

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Question 7

Pure-breeding individuals always have the ____________________ genotype.

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Question 8

A man has the aa phenotype that causes albinism. As such, he does not express his PP genotype, which would have made his eyes brown. The relationship between these two genes is an example of ____________________.

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Question 9

In Mendel's crosses, pure-breeding individuals were always in the ____________________ generation.

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Question 10

Does the segregation or separation of members of a gene pair take place at one or both meiotic divisions? If not, which one? What evidence is there to support your answer?

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Question 11

Two parents with type A blood have a child who is type O. The parents' genotypes must be ____________________ and ____________________ or they must have the ____________ phenotype.

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Question 12

The genetic recombination event discovered by Mendel is _______ .

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Question 13

What are the possible phenotypes for the children of parents who are both AB? What if the parents are both O? What if one parent is O and the other is AB?

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Question 14

What are the evolutionary advantages (if any) of segregation and independent assortment?

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Question 15

Two heterozygous smooth-pea pea plants are crossed (Ss X Ss) and four peas from the cross are randomly selected for examination. The first three are smooth. Must the fourth one be wrinkled? Why or why not?

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Quiz 3: Transmission of Genes From Generation to Generation

The inheritance of human traits is predictable because the genes controlling them exhibit the principles of both and .