An Fi plant undergoes selt-tert?lization(aDaDD A AUD offspring. Assume independe

Question

An Fi plant undergoes selt-tert?lization(aDaDD A AUD offspring. Assume independent assortment of these six genes 5) How many different types of gametes would each Fi individual produce? 6) How many different unique types of genotypes would appear in the F2 generation? ) What is the probability that an F2 offspring would have the aabbccddee genotype? 8) What is the probability that an F2 offspring would have the AaBbCcDdEe genotype? A) 16 B) 4 C) 8 D) 2 E) 32 A) 3 B) 9 C) 81 D) 243 E) 729 A) 1/256 B) 1/64 C) 1/1024 D) 1/512 E) 1/16 A) 1/16 B) 1/4 C) 1/8 D) 1/2 E) 1/32 Questions 9 to 12 are connected A true breeding tan body and long wings Drosophila fly is mated with dark body and wingless fly. All the Fi flies have tan body with long wings. The Fi flies are mated yielding the following F2 offspring data 300 100 100 30 Tan body and long wing flies Tan body and wingless flies Dark body and long wing flies Dark body and wingless flies

Explanation / Answer

Parental cross: AaBbCcDdEe X AaBbCcDdEe

5. Number of different gametes produced = 2 X 2 X 2 X 2 X 2 X 2 = 64

6. Number of different genotyes = 3^n (n = number of heterozygous genes) = 3^5 = 243

7. Probability of aabbccddee = 1/4^n (n = number of heterozygous genes) = 1/4^5 = 1/1024

8. Probability of AaBbCcDdEe = 1/2^n (n = number of heterozygous genes) = 1/2^5 = 1/32

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