2.9 A dominant gene in Ayrshire cattle controls the presence of notch in the tips of the ears. In the pedigree below, the shaded areas represent notched individuals. I || 2.9.1 2.9.2 1 (a) 1112 x 1113 (b) 1112 x 1115. 2 2 O 3 3 2 4 5 4 6 5 By using your own symbols, determine the genotypes for all the individuals in the pedigree shown. Determine the probability of getting notched progeny from the crosses between:

A worldwide survey of genetic variation in human populations reported the autosomal codominant MN blood group types in a sample of 1029 Chinese individuals from Hong Kong. The sample contained 342 people with blood type M, 500 with blood type MN, and 187 with blood type N. Part A The number of people expected in each blood-type category is: Enter the values expected for MM, MN and NN blood-type categories, respectively, separated by commas and using two decimal places (example 1.02, 2.30, 3.45).

(D) 1/6 (E) 1/64 26. In sheep, eye color is controlled by a single gene with two alleles. When a homozygous brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue-eyed offspring are produced. If the blue-cyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes? (A) 0% (В) 25% (C) 50% (D) 75% (E) 100% 27. In peas the trait for tall plants is dominant (T) and the trait for short plants is recessive (t). The trait for yellow seed color is dominant (Y) and the trait for green seed color is recessive (y). A cross between two plants results in 296 tall yellow plants and 104 tall green plants. Which of the following are most likely to be the genotypes of the parents? (A) TTYY x TTYY (В) Туу х ТТYу (C) TIYY x TIYy (D) TIYy x TTYY (E) TtYY x Ttyy 28. In humans, red-green color blindness is a sexlinked recessive trait. If a man and a woman produce a color-blind son, which of the following must be true? (A) The father is color-blind. (B)…

1. The figure below shows a pedigree examining the presence of a genetic disorder across multiple generations of a family. Based off this figure, answer the following questions prompted: || IV 3 9 10 5 2 C 6 11 T 7 12 8 15 13 16 14 17 d) What is the genotype for individual #4 in this family pedigree? ||| c) Why are no family members identified as a carrier of this genetic disorder? Figure Key a) Using the figure key provided, identify which members of this family are affected by this genetic disorder in each generation. (Be sure to include sex and generation number for each individual identified). b) Is this an autosomal recessive, autosomal dominant, or sex-linked genetic disorder? Explain. Unaffected Female Unaffected Male Affected Female ||| Affected Male Female Carrier Male Carrier

26. The trait represented in the following pedigree is expressed only in the males of the family. Is the trait Y linked? Why or why not? If you believe that the trait is not Y linked, propose an alternative explanation for its inheritance. 1 2 II 3 6 II I 2 3 4 5 6 7 8 IV 1 2 Pierce, Genetics: A Conceptual Approach, 7e © 2020 W. H. Freeman and Company