Exam 5: The Inheritance of Single Gene Traits

Match the genetic notations to their definitions. -offspring of the initial mating cross

The chi-square test can be used to test genetics hypotheses. For example, it can be used to test the hypothesis that a trait is recessive, in which case two heterozygous parents would be expected to yield 25% homozygous offspring expressing the trait. Large deviations from the expected 25% may indicate the hypothesis is incorrect. The chi-square equation is as follows: chi-square = [total of (observed-expected)²] / expected A cross between two heterozygous tall plants resulted in 136 tall offspring and 36 short offspring. Calculate the chi square value. Give your answer to 2 decimal places.

What is the term used for the first individual identified in a family to be affected by a phenotype?

Fill in the blank. If two or more independent events produce the same result, the probability that either will occur is the ____ of their probabilities.

In an experiment, you have a tall plant that produces round peas. Tall and round are dominant and the plant is heterozygous for both traits. The plant is then self-fertilized. What is the probability that a single offspring plant is tall and has wrinkled peas? Express your answer as a decimal.

A cross between tall plants (Tt genotype) and short plants (tt genotype) produced 6 offspring. What is the probability that all 6 offspring are tall?

Which of the following characteristics do genes need to possess? Please select all that apply.

Which of the statements about inheritance of rare traits in pedigrees are true? Please select all that apply.