Question

In a newly discovered diploid animal species, tail length is determined solely by 2 additive gene loci that can have the allele s, which contributes 4mm, and the allele l, which contributes 15mm. Two lines with the genotypes A _sA _sB_s B _sand A _lA _lB _sB _sare mated to create the F₁ generation.

In a newly discovered diploid animal species, tail length is determined solely by 2 additive gene loci that can have the allele s, which contributes 4mm, and the allele I, which contributes 15mm. Two lines with the genotypes AA,BB and A,A,B B are mated to create the F1 generation. Part A What is the predicted genotype and phenotype of the F1 progeny? OASASBSB si 12mm ASA,BB si 19mm O A,A,B$B$; 38mm ASA,BB ,27mm

Answer 1

Given in the question newly discovered diploid animal species, tail length is determined solely by 2 additive gene loci that can have the allele s, which contributes 4mm, and the allele l, which contributes 15mm.

Two lines with the genotypes AsAsBsBs and AlAlBsBs are mated to create the F1 generation
Parent I & Parent 2 o As As Bs B X A; A; Bs Bs. (A;Bs) nametes (ABS) As A; Bs Bs o f generation length of tail of ASA, B Bs will be Each s alleles contribute 4mm & each i alleles contribute 15mm Eriven in the genotype As A; B; Bs their is 3 salloles & 1 I allere so, tatal length of = 4+4+4 + 15 = 27 mm Hence Answer is option 4 - As A i B s Bs 27mm & other option can be eliminated tail will be

B) If Individual off, generation is crossed with each other. AA Bg Br. A A; Bg B X А, В, А, В, As Bs As As BSB / AS A, B, B, | A; Bs As A i BSA A; ABB nametes & generakan Phenotypic Canem Ratio - : 2 1 (As A, B , Bu) (A,A,BsBs) (Ai A, B, Bs ) Tail lengin of Each genotype n A As B Bs = 4 + 4 + 4 + 4 = 16mm As A i B B = 4+15+ 4 + 4 = 27 mm Ai Ai BS BS = 15+15+utu 38mm 16mm 270m 38 mm Hence Answer is option 7 - 1:2.1 Other option can be eliminared