D3.2 Inheritance

Question 1

Inheritance

Answer 1

The fusion of haploid gametes to form a diploid zygote.

Question 2

Outline inheritance as the fertilization of gametes as the basis of inheritance:

Answer 2

• Eukaryotes reproduce sexually to pass genes to offspring in gametes.
• F and M gametes have an equal number of chromos so M and F have equal genetic contributions.
• Meiosis is required to halve the chromo number of a diploid cell.
• Diploid cells have an equal number of each autosomal gene.
• Fusion of male and female gametes produces a zygote and body cells are produced by mitosis.

Question 3

Why can pea plants self-pollinate and self-fertilize?

Answer 3

They have male and female gametes.

Question 4

Outline the steps of cross-pollination:

Answer 4

• Cut off anthers from the ‘‘female’’ parent, BEFORE POLLINATION.
• Enclose the flower in a bag for storage.
• allow the stigma (F) to mature and transfer pollen from M anthers.
• wait for the pollen to germinate and the eggs to fertilize, where they can be collected as seeds.

Question 5

Male Gamete organ in flowers

Answer 5

anthers

Question 6

Female gamete organ

Answer 6

stigma

Question 7

parents name

Answer 7

P generation

Question 8

Childrens name

Answer 8

F1 Generation

Question 9

grandchildrens name

Answer 9

F2 Generation

Question 10

Alleles

Answer 10

Different versions of the same gene

Question 11

Genotypes

Answer 11

Combinations of alleles