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Exam 2: Transmission Genetics

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Question 21

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In rabbits, long hair and black fur are produced by the dominant alleles L and B, which assort independently. The genotype ll produces short hair and the genotype bb produces white fur. A cross between a male with short, black fur and a female with long, white fur produces four offspring with short, black fur, four offspring with long, white fur, four offspring with short, white fur, and four offspring with long, black fur. What are the genotypes of the parents?

A) llBB × LLbb
B) LlBb × LlBb
C) llBb × Llbb
D) LLBB × llbb
E) Impossible to determine from the information given.

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

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Question 22

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What is the probability of rolling two six-sided dice and obtaining an odd number on at least one die?

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9/36 + 9/36 + 9/36 = 27/36 = 3/4 Probabi...

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Question 23

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In peas, the yellow allele is dominant over the green allele. A plant with yellow peas was crossed to a plant with green peas. The resulting plants were 50% yellow and 50% green. What is the genotype of the parents in this cross?

What is the probability of rolling one six-sided die and obtaining any number but 6?

Mendel performed many types of crosses, including those in which the same genotypes are crossed but the sexes of the parents are switched. These are known as __________.

What is the probability of rolling two six-sided dice and obtaining at least one 3?

What is the probability of rolling one six-sided die and obtaining a 1 or a 2?

What type of cross would be used to illustrate Mendel's law of independent assortment?

In a cross between individuals who are both heterozygous (carriers)for a recessive disease such as albinism, you would like to determine the risk of one or more children to inherit the recessive phenotype. Which of the rules of probability can be used to calculate the probability of a particular combination of events that each have two alternative outcomes?

The P value is a quantitative expression of the probability that the results of another experiment of the same size and structure will deviate from expected results as much as or more than by chance. The greater the difference between observed and expected results of an experiment, __________.

In the accompanying figure, the chance that individual III-2 is a heterozygous carrier is __________.

A normal distribution curve contains all the possible experimental outcomes in graph form. The tall central segment of the curve represents the outcomes with the highest probability of occurrence. The average outcome, represented by the center of the data distribution, is known as what?

The statistical interpretation of a χ² value is determined by identifying the P value for each experiment, and the P value is dependent on the number of degrees of freedom (df) in the experiment being examined. For a coin flip experiment, the df value is equal to 1. You perform an experiment to determine how many times out of 100 die rolls that you roll a "1" in a single roll. What would the df value be equal to?

The law of segregation would predict that the F₂ progeny of F₁ heterozygous plants will exhibit a __________.

Crosses in which F₁ plants heterozygous for a given allele are crossed to generate a 3:1 phenotypic ratio in the F₂ generation are known as __________.

Assuming independent assortment, what phenotypic ratio would you expect to see if an individual with the genotype RrGg is self-crossed?

Describe the blending theory of heredity and how Mendel's results help to reject this theory.

The law of independent assortment would predict that the F₂ progeny of F₁ heterozygous plants will exhibit a __________.

In 1997, a gene called Le was discovered by two research groups led by David Martin and Diane Lester. Allelic variation in the Le gene, which controls elongation of the plant stem between branches, is responsible for which trait in peas?

A cross between a short pea plant and a tall pea plant results in a 1:1 genotypic and phenotypic ratio in the offspring. What are the genotypes of the parent plants?