Question

Guinea Pigs can either have black fur (B) or white fur (b) and rough textured coats (R) or smooth textured coats (r).

Answer 1

Answer:

The answers are explained below:

1. Black rough fur - $\frac{1}{2}=\frac{8}{16}$.
2. Black smooth fur - $\frac{1}{2}=\frac{8}{16}$.
3. White rough fur - $\frac{0}{16}$.
4. white smooth fur -$\frac{0}{16}$

Explanation:

• The genotype of homozygous black fur and smooth texture: BBrr.
• The gametes produced are : Br
• The genotype of white and  heterozygous for rough texture: bbRr
• The gametes produced are : bR and br.
• The cross,

                                                             bR        br

                                                    Br    BbRr     Bbrr

                                                           (B/R)   (B/S)

• In the brackets (),

1. B - Black.
2. R - Rough.
3. S -Smooth.

• The cross can develop two types of offspring, that is,

1. Black and Rough (BbRr) - 1.
2. Black and smooth  (Bbrr)- 1.

• The answers:

1. Black rough fur - $\frac{1}{2}=\frac{8}{16}$.
2. Black smooth fur - $\frac{1}{2}=\frac{8}{16}$.
3. White rough fur - $\frac{0}{16}$.
4. white smooth fur -$\frac{0}{16}$