oo Simple Mobile 4G 9:39 PM 589 roosevelt.blackboard.com 13. Suppose that a trih

Question

oo Simple Mobile 4G 9:39 PM 589 roosevelt.blackboard.com 13. Suppose that a trihybrid cross of JJTTaa X jttAA is made in a cat species in which JA are dominant, but there is no dominance between A and a. Only consider the F2 progeny resulting from this cross, an independent assortment (1.5 pts) a) How many phenotypic classes are expected? b) What is the probability of genotype JJ t AA? c) What proportion would be expected to be homozygous for all genes? BONUS QUESTION: The father of Mr. Spock, first officer of the starship Enterprise, came from the planet Vulcan; his mother came from planet Earth. A Vulcan has pointed ears (+), adrenals absent (+), and a right-sided heart (+) All of these alleles are dominant over Earth alleles. These genes are autosomal, and they are linked as shown in the linkage map: (1.0pts) d assume 18 m.u. If Mr. Spock marries an Earth woman, what proportion of their children A. Will show Vulcan appearance for all three characters? B. Will show Earth appearance for all three characters? C. Will have Vulcan ears and heart but Earth adrenals? D. Will have Vulcan ears but Earth heart and adrenals? 16 m.u

Explanation / Answer

a.Phenotypically there are two classes. one all with JA or Ja and other with ja.

b.probability of JJttAA are 1/64.

c. 2/64 =1/32=0.03125=31.25% population will be homozygous for all genes, JJTTAA and jjttaa.

JTA JtA JTa Jta jTA jtA jTa jta JTA JJTTAA JJTTAa JJTTAa JJTtAa JjTTAA JjTtAA JjTTAa JjTtAa JtA JJTtAA JJttAA JJTtAa JJttAa JjTtAA JjttAA JjTtAa JjttAa JTa JJTTAa JJTtAa JJTTaa JJTtaa JjTTAa JjTtAa JjTTaa JjTtaa Jta JJTtAa JJttAa JJTtaa JJttaa JjTtAa JjttAa JjTtAa Jjttaa jTA JjTTAA JjTtAA JjTTAa JJTtAA jjTTAA jjTtAA jjTTAa jjTtAa jtA JjTtAA JjttAA JjTtAa JjttAa jjTtAA jjttAA jjTtAa jjTtAa jTa JjTTAa JjTtAa JjTTaa JjTtaa jjTTAa jjTtAa jjTTaa jjTtaa jta JjTtAa JjttAa JjTtaa Jjttaa jjTtAa jjttAa jjTtaa jjttaa

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