Inheritance

Rabbits can inherit a coat trait called rex fur (which makes the fur very curly and soft).

The dominant allele $R\,$ produces normal fur, while the recessive allele $r\,$ produces rex fur.

The table below shows the results of six different breeding crosses of rabbits with various genotypes:

Cross	Parent 1	Parent 2	Offspring
A	$r r$	$r r$	$r r, r r, r r, r r$
B	$R r$	$R r$	$R R, R r, R r, r r$
C	$R R$	$R R$	$R R, R R, R R, R R$
D	$r r$	$R r$	$R r, R r, r r, r r$
E	$r r$	$R R$	$R r, R r, R r, R r$
F	$R R$	$R r$	$R R, R R, R r, R r$

All the offspring from Cross C have normal fur. Give the letter of each of the other crosses where all the offspring have normal fur.

[1]

Give the phenotype of both parents used in Cross A.

[1]

Which cross has a 50% probability of producing offspring with normal fur?

[1]

Give the genotype of each of the offspring produced in Cross E.

[1]

The crosses between the rabbits are examples of sexual reproduction. Name the gamete produced by males in sexual reproduction.

[1]

Name the gamete produced by females in sexual reproduction.

[1]

Give the scientific term used to describe the fusion of these gametes.

[1]

In which organ of a female parent do the offspring develop?

[1]

Inheritance Questions