phschool.com endent assor.. Laws of Inheritance 1. In MendAliens, No. Pearson Th

Question

phschool.com endent assor.. Laws of Inheritance 1. In MendAliens, No. Pearson The Biolo... MendAliens, normal head top is dominant to Bart head top, in which the top of the head is jagged. Suppose a MendAlien homozygous for normal head shape is crossed with one homozygous for Bart head shape. Analysis of Crosses Genetic X Files Probiems a. What are the genotypes of the two parents? HH xhh For each of the following, give the genotype(s) and phenotypes(s) and their proportions: b. the Fi generation Hh (normal head) c. the F2 generation Hint for d. an e.: You have already assigned a genotype to the Fi individual in part b. Now think carefully about the phenotype of the other individual, and assign the appropriate genotype. Then you are ready to make the cross, as discussed in the Analyzing Genetic Crosses section. d. the offispring of a cross of an Fi individual to a true-breeding normal-head-topped individual

Explanation / Answer

A).Here, given is,

MendAliens- HH

Bart- hh

B).For F1 generation, the cross made will be HH×hh

This will give all Hh offspring. And Normal head is dominant, so all offspring will have normal head.

C). For F2 generation, the cross will be made between Hh×Hh

This will give

1 HH normal head

2 Hh normal head

1 hh bart head.

D). The genotype of F1 is Hh

If it is crossed to a true breeding normal head, that is, HH

Then, Hh×HH

2 individuals with HH genotype will be produced. And 2 individuals with Hh genotype will be produced. And all will have normal head top.

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