Please help me to solve all the questions below. Dont all only some of them, ple

Question

Please help me to solve all the questions below. Dont all only some of them, please. The answer 35.a; 36.b; 37.c; 38.a; 39.a; 40.c; 41.b; 42.a; 43.e. depts.ttu.edu/biology/people/Faculty/ZhangHong/Genetics SampleTestProblems.pdf 35. A plant of genotype CCdd is crossed to ceDD and an FI testcrossed to codd. If the genes are linked, and 20 cM apart, the percentage of codd recombinants will be a. 10. b. 20. e. 25 d. 50 e. 75 36. In Drasophila, the two genes w and sn are X-linked and 25 map units apart. A female fly of genotypewsnhvsn is crossed to a male from a wild-type line. What percent of male progeny will be w sn? a. 0;b. 12.5; c. 25; d. 37.5; e. 50. 37. In maize, two plants that are heterozygous for the recessive alleles a and b are crossed, what frequency of double-mutant progeny will appear if a and b are 7.2 map units apart, and both parents carry a and b in trans (configuration)? a. 0.036; b. 0.0625; c. 0.001296 d. 0.005184; e. 0.072. 38. In a four-point testcross the number of phenotypic classes of progeny expected is a. 16; b. 8; c. 81; d. 4; e. cannot be determined. 39. The following recessive alleles arelfound in corn: g, glossy leaf and r, red aleurone. A hybrid of unknown origin is testcrossed, with the following 1,000 progeny resulting: red, 127; glossy 153; wild-type, 352, and glossy + red, 368. Which of the following could have been a parent of the dihybrid, assuming the parents were homozygous? a. glossy, red; b. glossy; e. red; d. more than one of these; e. none of these choices 11 Evolution Lab.. .docx

Explanation / Answer

35. If the genes are located 20cM apart then the recominant frequency is 20%. CcDd is 20%. off of this cd will produce ccdd offsprings and would be produced by 50% of the gametes, thus 20%/2 =10

36. k

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