13:10 l 5G Done Photo Use the following information to answer question 3. In sheep, white wool is a dominant trait and black wool is a recessive trait. In a herd of 500 sheep, 20 sheep have black wool. Numerical Response: Bb 20 3. In this herd, what is the frequency of the heterozygous genotype? Answer: Record your answer as a value from 0 to 1, rounded to two decimal places.

Oner is recessive GUIDED PRACTICE: Directions: For each scenario, complete the highlighted sections. 1. In Mendel's crosses, the round was dominant. What is the phenotype of each of the following? Genotype Phenotype RR Rr

1₁ F3 8 A = all of the dominant alleles for a particular trait in a specific population; a = all of the recessive alleles for a particular trait in a specific population In the following equations "A" is represented by "p" "a" is represented by "q" Hardy Weinberg equations: Allele distributions in Generation 1: 36 homozygous dominant individuals 13 heterozygous individuals 1 homozygous recessive individual Explanation of terminology: px p=p² There are 50 individuals in this particular population. We want to see if allele distributions change from generation to generation. We will use the Hardy Weinberg equations to find out. Due to migration and random mating of the parent generation, the percentage of homozygous recessive genotypes in Generation 2 offspring increases, changing_"a" to 40%, so a = 40 If "a" = .40, and "a"=q, then q = $ Remember that p + q = 1.0 If q, then p must = How many of these 50 offspring are homozygous dominant, heterozygous, or homozygous recessive? p² + 2pq+q²=…

PRACTICE EXERCISES 2: 1. For instance, in cows, red (R) and white (W) are two possible hair colors. However, when a red cow and a white cow mate, instead of one color being dominant over the other, BOTH are expressed, in a color called roan (red-and-white). Fill out the genotypes below: Homozygous red: Homozygous white: Roan: Show the Punnett Square for a cross between two roan cows: Probability of roan offspring: Probability of red offspring: Probability of white offspring: % 2 If R is the allele for red and W is the allele for white in a flower, and this is codominance, show what happens if a red flower is crossed with a white flower. Red genotype: White genotype: Phenotype (offspring): Genotype (offspring):