Question

BIOL 1302 MODULE 1: Evolution - Quantitative and Empirical Reasoning Answer Sheet Instructions to the student: Please make sure you show ALL of your work neatly and legible. Show step by step how you solved each problem, include even the simplest of steps. Clearly box each answer. Once you complete this assignment, please scan and upload your answers to our Blackboard Lear submission box in the Module 5 tab of our course. All uploads must be in PDF format. Additional instructions on how to create a PDF file will be posted. Submit a paper copy to my box (OMB N 813) before 5:00PM Friday, September 20 1. Based on the scenario (on Blackboard), what is the frequency of the homozygous recessive individuals? 2. Based on the scenario (on Blackboard), what is the allelic frequency of the dominant allele in the population? 3. Of the total squirrels observed, how many were heterozygous based on the scenario (page 1)? In the year 2015, another group of scientists studied the squirrel coat color and found that the population of squirrels hod increased. They found 850 squirrels in the same area, of which 115 had a red coat. 4. Assuming that the population is in Hardy Weinberg's equilibrium, how many of the 850 squirrels would be expected to be gray? 5. How many of these gray squirrels would be homozygous for the dominant allele? 6. What is the frequency of the recessive allele? 7. Has the frequency of the gray and red squirrels changed? If not, why and if they have, why so?

Answer 1

Answer 1, 2, and 3 are given below on the basis of information provided in the question.

Grey → AA, Aa + Dominant 7536 Red aa → Recessive 64 Total = 536 +64 = 600 Frequency of homozygous recessive individuals = 64_X100 caa) 600 = 10.66% 9,2 = 0.1 q, = 0.31 - Frequency of a Allele. @ frequency of dominant allele, p = |--9 from the eq. Ip+ q = 1 op 0.7 nép: 1-0.3 ® cumunar of Heterozygous = dpa Frequency of Heterozygous al. 4x0.3 = 0.42 i 42% Heterozygous = No. of Hetrozygous X 100 Total of * No. of Heterozygous = 4.2x600 100 = 252