In a cross of a h-r+ X h+r-, the following progeny were produced: 25 h-r+ 23 h+r- 7 h+r+ 5 h-r- What is the map distance between h and r?   A.2 mu B.12 mu C.20 mu D.30 mu E.35 mu

What is the most likely order of the linked genes R, S, and T if the distance between R and S is 22 cM, the distance between S and T is 8cM, and the distance between R and T is 14 cM?   A. R S T       B. T R S       C. Cannot be determined     D. S T R

You know that cystic fibrosis runs in your mothers family. Your fathers family is not known to have it. Is it worse to have a parent with Costco fibrosis or a sibling with cystic fibrosis? Draw a small pedigree for both options make the appropriate assumptions and calculate the chances for each, then state your conclusion.

Assume that D, E, F, G, H, and I are autosomal genes on different chromosomes. From the mating (parent A) Dd ee Ff GG Hh li x (parent B) Dd EE FF Gg Hh ii. A. What is the probability that one of the offspring will have the genotype Dd Ee FF Gg hh li? B. What is the probability that one of the offspring will be heterozygous for each allele?

In this test cross of AaBbCc you got these results: 100 АВС 100 abc 100 ABC 100 abC 25Abc 25ABC 25 аBС 25 аВс a) Which two genes are linked? Show or explain how you know. b) How far apart are those genes?

A poultry grower has 2 breeds of chicken, averaging 9 and 5 lbs. inweight. The F1 of the cross between is quite uniform, averaging 7lbs. Of the F2 progeny, 0.4% is as heavy as either parent. a. How much does each effective allele contribute to weight? b. What is the number of polygenes pairs involved in thesecrosses? c. If only those with an average weight of 6-8 lbs. are marketable, whatpercentage of the offspring will yield profit for the grower?

In tomatoes, dwarf (d) is recessive to tall (D) and opaque (light-green) leaves (op) are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 m.u. For each of the following crosses, determine the phenotypes and proportions of progeny produced.