In sheep, eye color is controlled by a single gene with two alleles. when a homozygous brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue-eyed offspring are produced. if the blue-eyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes?
Answers
25% offspring have brown eyes
Explanation:
- let homozygous brown-eyed sheep = bb
- let homozygous green-eyed sheep = gg
- bb × gg = bg, bg, bg, bg
- b b
g bg bg
g bg bg
- If the blue-eyed sheep are mated with each other i.e bg × bg = bb, bg,bg, gg
- b g
b bb bg
g bg gg
- Therefore, the percentage of bb (which is brown) = 1/4
- =0.25 Hence answer is 25%
25%
Explanation:
homozygous brown-eyed sheep = bb
homozygous green-eyed sheep = gg
bb × gg = bg, bg, bg, bg
Punnett square:
b b
g bg bg
g bg bg
If the blue-eyed sheep are mated with each other i.e bg × bg = bb, bg,bg, gg
Punnett square:
b g
b bb bg
g bg gg
Therefore, Brown sheeps = 1/4 i.e 25%
The Punnett square is a table that lists all of the possible results of a genetic cross between two people who have known genotypes. The Punnett square is a square divided into four quadrants in its most basic form. All potential genotypes for haploid female gametes are presented across the top, one genotype at the head of each column; and all possible genotypes for haploid male gametes are listed down the left side of the square, one per row.