2. In the lab, you learned that vestigial wings are recessive to normal wings in

Question

2. In the lab, you learned that vestigial wings are recessive to normal wings in fruit flies. Use the information from the above question, as well. You have mated a fly homozygous for short antennae and heterozygous for wing type with one that is homozygous recessive for both wing shape and antennae length. a. Allele symbols: Long antennae Short antennae (1pt) Normal wing Vestigial wing b. What are the genotypes of the parents? (1pt) i. Genotype of Parent 1: ii. Genotype of Parent 2: What are the allele combinations of gametes produced by each of these parents? (2pt) c. i. Gametes of Parent 1 ii. Gametes of Parent 2:

Explanation / Answer

A)

Allele symbols:

Long antenna: A
Short antennae: a

Normal Wing: V
Vestigial wing: v

B)

(i) Genotype of parent 1 : aaVv
Reason: The phenotype of the parent is homozygous short antennae ( which means two ‘a’), and heterozygous for wing type (which means one ‘V’, and one ‘v’).

(ii) Genotype of parent 2: aavv
Reason: The phenotype of the parent is homozygous short antennae (which means two ‘a’), and homozygous for vestigial wing type (which means two ‘v’).

C)

(i) Allele combinations by parent 1: aV, av, aV, av

(ii) Allele combinations by parent 2: av, av, av, av

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