Exam 2: Transmission Genetics

The hereditary particles that are passed from one generation are called alleles in modern terminology. This term had not been invented in Mendel's time; instead, he determined that two "________" (alleles)were present for each trait in a plant and together determined the phenotype of the trait.

The statistical value obtained from a chi-square analysis refers to the probability that the deviations between the observed numbers and the expected numbers are caused by what?

The blending theory would predict that the phenotype seen in the F₁ generation from a cross between a pure breeding plant with dark purple flowers and a pure breeding plant with white flowers would be __________.

In peas, axial (A)flower position is dominant to terminal (a), and tall (L)is dominant to short (l). If a plant that is heterozygous for both traits is allowed to self-fertilize, how many of the offspring would also be heterozygous for both traits?

The gene L determines hair length in rabbits. The gene B determines hair color. A rabbit with long, black hair is crossed to a rabbit with short, white hair. All the offspring have long, black hair. What are the genotypes of the parents?

The P value is dependent on the number of ________, which is equal to the number of independent variables in an experiment.

What is the probability of rolling two six-sided dice and obtaining two 4's?

You count 1000 F₂ seeds from a monohybrid cross. How many do you expect to display the dominant phenotype?

One key to Mendel's success was choosing to observe ________ traits, which exhibit one of two possible phenotypes.

What genotypic ratio would you expect to see among the progeny of a monohybrid cross?

A couple has four children. What is the probability that they have four boys?

The genes responsible for some of the traits that Mendel observed have been recently identified and have helped in determining how molecular variation produces morphologic variation in pea plants. Allelic variation in the Sbe1 gene, which produces starch-branching enzyme 1, is responsible for which trait in peas?

A ratio of 9:3:3:1 is expected among the F₂ progeny of a dihybrid cross as a result of ________ of alleles at two loci.

You have self-fertilized a plant with round seeds that is heterozygous, and you want to determine what proportion of the offspring will be not only dominant, but also true-breeding. Which of the rules of probability can be used to calculate the probability of obtaining a particular outcome when specific information about that outcome modifies the probability calculation?

The statistical interpretation of a chi-square value is determined by identifying the __________.