In hamsters, ALB?NISM (lack of color pigmentation) is recessive to FULL COLOR. A
ID: 255478 • Letter: I
Question
In hamsters, ALB?NISM (lack of color pigmentation) is recessive to FULL COLOR. At my house, we have both true-breeding ALBINO hamsters and true-breeding FULLY COLORED hamsters. While I was away on vacation, my pet sitter allowed my 2 groups of hamsters to interact (and possibly breed). Now I have a litter of FULLY COLORED hamsters, but I do not know the genotype of these individuals. Answer the following based on the new litter (F1) of hamsters. a) Name the procedure to determine the genotype of these FULLY COLORED F1 3) hamsters with the dominant phenotype. b) Based on the procedure named in a), show the 2 possible Punnett Squares that can be created in this situation. And for each Punnett Square, provide the expected PHENOTYPIC ratio. (label your answer)Explanation / Answer
since we have true breeding phenotype mating case so we have heterozygous F1 generation.
true breeding fully colored genotype is BB and true breeding albino genotype is bb then F1 generation will have genotype Bb.
for checking the genotype of F1 generation we will perform test cross with recessive genotype individual.
so Bb x bb = Bb, Bb, bb and bb so we will get 50% colored and 50% albino genotype.
or we can perform F1 selfing
Bb x Bb = BB, Bb, Bb and bb. so we will get 1:2:1 genotypic ratio and 3:1 phenotypic ratio.