Inheritance

Mice can inherit a coat trait called satin coat (which makes the fur very glossy and silky).

The dominant allele $S$ produces a normal coat, while the recessive allele $s$ produces a satin coat.

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

Cross	Parent 1	Parent 2	Offspring
A	$ss$	$S S$	$S s, S s, S s, S s$
B	$S S$	$S S$	$S S, S S, S S, S S$
C	$ss$	$ss$	$ss, ss, ss, ss$
D	$S S$	$S s$	$S S, S S, S s, S s$
E	$ss$	$S s$	$S s, S s, ss, ss$
F	$S s$	$S s$	$S S, S s, S s, ss$

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

[1]

Give the phenotype of both parents used in Cross C.

[1]

Which cross has a $50%50\%$ probability of producing offspring with normal coat?

[1]

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

[1]

The crosses between the mice 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