4. PLEASE SHOW ALL WORK!!! Two organisms AABBCCDDEE and aabbccddee are mated to

Question

4. PLEASE SHOW ALL WORK!!! Two organisms AABBCCDDEE and aabbccddee are mated to produce F1 that is self-fertilized. If the capital letter represents dominant, independently assorting alleles: (2.0pts.)

A) How many different genotypes will occur in the F2?

B) What proportion of the F2 genotypes will be recessive for all five loci?

c)Would you change your answers (a and/or b) if the initial cross occurred between AABBccDDEE X aabbccddEE parents?

d)Would you change your answers (a and/or b) if the initial cross occurred between AABBccDDee X aabbCCddEE parents?

Explanation / Answer

If mating occurs between two organism with genotypes AABBCCDDEE and aabbccddee respectively then the genotypes of the F1 generation are heterozygous(AaBbCcDdEe). If F1 generation are self-fertilized then.

(A) The number of different which occurs in the F2 generation are 35 = 243 types.

(B)

(C) If the initial cross occurs betweeen AABBccDDEE and aabbccddEE then the number of differnt genotypes occus in the second generation are 33 = 27 types. Therefore answer is "YES", the answers "a" and "b" will be changed.

(4) If the initial cross occurs between AABBccDDee and aabbCCddEE the genotype of the F1 generation is heterozygous(AaBbCcDdEe). Therefore answer is "NO", the answers "a" and "b" will not be changed.

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