1.1. Fig. 1 shows a goat with white fur.

Fig. 1

Fur colour is inherited in goats.

• The allele for white fur is represented by A.

• The allele for black fur is represented by a.

• Each goat is identified by the numbers 1 to 8 in Fig. 2.

Fig. 2 shows a diagram of the inheritance of fur colour in a herd of goats.

Fig. 2

Use Fig. 2 to answer these questions.

(i) State how many goats have white fur.

[1]

(ii) State the phenotype of goat 5.

[1]

(iii) Draw circles around two terms that can be used to describe the genotype of goat 6.

black                          dominant                          heterozygous

homozygous                            recessive                                white

[2]

1.2. State the name of the type of variation shown by fur colour in these goats.

1.3. A farmer identified two goats to breed together. 

• The genotype of the male goat is Aa.

• The genotype of the female goat is Aa.

Complete the genetic diagram and the phenotypic ratio for this cross.

1.4. Describe the process a farmer could use to breed a herd of white goats.