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Exam 12: Patterns of Inheritance

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Question 21

Multiple Choice

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If you crossed flies heterozygous for the Cy allele, what phenotypes would you find in the adult F₁ generation?

A) both wild type and curly wings
B) wild type only
C) curly wings only
D) None because all the F₁ flies would die before reaching adulthood.

E) B) and D)
F) B) and C)

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Question 22

Multiple Choice

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Three babies were recently mixed up in a hospital.Based on the data in the table above, the couple with blood types A and B are the actual parents of the child with blood type

A) O
B) B
C) AB
D) none of these babies could be the child of the couple with blood types A and B

E) A) and B)
F) None of the above

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Question 23

Multiple Choice

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If fertilization involves two gametes that contain different alleles of a given gene, the resulting offspring is

An extensive study was conducted on identical twins who were separated at birth.Among other things, the study showed that the individual from each pair who received better nutrition during childhood tended to score higher on standardized intelligence tests.This can best be described as an example of how

As a genetic counselor, you are constructing a human pedigree for a particular disease.You note that every generation shows the trait, suggesting that the trait is

A diploid organism that has two identical alleles for a given trait is called _______ for that trait.

In rabbits, there is a gene that controls ear length, with a dominant allele "T" for long ears and a recessive allele "t" for short ears.At another gene locus, there are alleles "B" for black coat and "W" for white coat.Neither the B or W allele is dominant, and BW produces a gray coat.These two allele pairs assort independently.If a gray rabbit that is heterozygous at the gene locus controlling ear length is mated with a white rabbit that is also heterozygous at the gene locus controlling ear length, what is the probability that their first offspring will be gray with long ears?

A male fruit fly has the genotype PpYYrrTt.In terms of these 4 allele pairs, how many different types of gametes can he form?

You toss a coin twice.Because the outcome of the first toss does not affect the outcome of the second toss, these 2 events are called

If you are tossing a six-sided die, what is the probability of getting either a 1 or a 2 on your first toss AND a 1 or a 2 on your second toss?

A Punnett square is generally used to

If an individual allele has more than one effect on the phenotype, this is called

What type of cross is used to determine if an individual with the dominant form of a trait is homozygous or heterozygous?

Mendel's Principle of Independent Assortment states that different pairs of

When Mendel crossed purple-flowered pea plants with white-flowered pea plants, he never got offspring with flowers that had an intermediate color.This was counter to the theory of

In a heterozygous individual, the allele being expressed is

The Principle of ________ states that the 2 alleles present at each gene locus separate from one another during gamete formation and remain distinct.

During his experiments with pea plants, Mendel referred to the trait that was expressed in the F₁ or first filial generation as

The observable expression of the genes present is called

Let P = purple flowers and p = white, and T = tall plants and t = dwarf.If the upper case letters represent the dominant alleles, what is the phenotype of a plant with the genotype PpTt?