Question

in sheep, the allele for white wool (w) is dominant, and the allele for black wool (w) is recessive. if a heterozygous white sheep is crossed with a homozygous black sheep, how many different genotypes are possible and what are they?

Explanation:

Step1: Determine Genotypes of Parents

The heterozygous white sheep has genotype \( Ww \) (since \( W \) is dominant for white, \( w \) for black). The homozygous black sheep has genotype \( ww \) (as \( w \) is recessive and homozygous means two recessive alleles).

Step2: Set Up Punnett Square

	\( W \)	\( w \)
\( w \)	\( Ww \)	\( ww \)

From the Punnett square, we can see the possible genotypes.

Step3: Identify Possible Genotypes

Looking at the Punnett square, the offspring can have two genotypes: \( Ww \) (heterozygous white) and \( ww \) (homozygous black). So there are 2 different genotypes.

Answer:

There are 2 different genotypes, which are \( Ww \) and \( ww \).