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Exam 7: Patterns of Inheritance

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Question 21

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The genetic makeup of an organism,such as Gg,is its ________.

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Question 22

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Which of the following did Mendel use to help him form the law of independent assortment?

A) dihybrid crosses between pea plants
B) monohybrid crosses between pea plants
C) traits that were codominant
D) traits with incomplete dominance

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Question 23

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Is it possible for two organisms with the same genotype to have different phenotypes? Explain your answer.

What is the smallest number of traits that are needed to test Mendel's law of independent assortment?

The observable physical characteristics of an organism are known as its ________.

A single gene with one dominant allele for black hair (B)and one recessive allele for brown hair (b)controls hair color in mice.A male mouse with black hair mates with a female mouse with brown hair and they have 12 offspring.Are you able to determine the predicted ratio of hair color in their offspring using a Punnett square? Explain your answer.

A pea plant that is heterozygous for the flower color gene makes gametes.What is the probability that a specific gamete contains the recessive allele for flower color?

Match the predicted genotype frequencies of heterozygous offspring from the genetic crosses given. -a heterozygous straight hair rabbit and a homozygous curly hair rabbit

Match the predicted genotype frequencies of heterozygous offspring from the genetic crosses given. -two heterozygous straight hair rabbits

Which of the following statements regarding genes is NOT true?

When comparing a human sperm cell to a skin cell from the same individual,what differences would be expected?

In humans there are three blood type alleles: A, B, and O. The blood type alleles A and B are fully expressed when they are present. Neither allele is considered dominant or recessive and neither is diluted when both alleles are present. The allele O is considered recessive and indicates a lack of either the A or B allele. How many blood type alleles are found in a given individual? What are the possible genotypes of an individual with type A blood in which only the A allele is expressed?

Match the following terms with their definitions. -a physical characteristic seen in an organism

A Punnett square is used to

Differentiate between pleiotropy and polygenic traits.

Mendel's laws

Miles is a student studying two Mendelian traits in a plant.He creates a Punnett square to examine the phenotype ratio in the F₂ generation.Interestingly,Miles finds that the phenotype ratio does not match up with the predicted phenotypes.He soon realizes that the two genes are physically linked to each other on the same chromosome.How would close physical proximity on the same chromosome affect the law of independent assortment?

Jennifer uses a dihybrid cross of fruit flies to examine inheritance patterns for eye color (black or white)and head shape (round or elongated).This cross produces 10,000 offspring,and the ratio is 1 (black eyes,round head): 1 (black eyes,elongated head): 1 (white eyes,round head): 1 (white eyes,elongated head).Is this what Jennifer should have expected from a dihybrid cross? Explain why or why not.

Explain the relationship between the genotype and the phenotype of a given trait.

Which of the following choices represents the genotype of an individual diploid organism?