2.  Homozygous dominant and homozygous recessive

3.  Both homozygous dominant

4.  Both heterozygous

1.  Breeding together brothers and sisters of the F1 generation

2.  Back crossing one or more of the F1 individuals

4.   Producing large progeny

1.  A characteristic is inherited ‘in combination’ with others

2.  The presence of one characteristic(e.g.,colour)modifies the inheritance of the others(e.g.,shape)

4.  Rare combinations of characteristics of characters are always due to mutations,which are inherited by the progeny

2.  Inheritance of one gene is not influenced by the inheritance of another and genes assort independently in successive generations

3.  One allele of a gene is dominant over the other

4.  One gene masks the effect of the other and is not transmitted independently from one generation to another

2.  That the two genes are complementary

3.  Single factor inheritance

4.  That it is a test cross

1.  Mating a black tom with a yellow tabby could give female tortoise-shell kittens

3.  A yellow male mated with a tortoise-shell female could give black male kittens

4.  A tortoise-shell kittens,whatever colour the tom cat she mates with

2.  Monohybrid cross

3.  Dihybrid cross

4.  None of these

1.  This is an example of a test cross

3.  This shows that the genes blend in F1

4.  This proves that colour has a genetic basis

1.  Complementary genes

2.  Epistasis

4.  Supplementary genes

1.  24

2.  12

4.  36