Development of gametes

Question 1

What is oogenesis?

Answer 1

Development of ovum

Question 2

What is spermatogenesis?

Answer 2

Development of spermatozoa from male primordial germ cells

Question 3

What is spermiogenesis?

Answer 3

The final stage of spermatogenesis where spermatids mature into mature, motile spermatozoa

Question 4

What is a diploid cell?

Answer 4

A cell with two complete sets of chromosomes, a normal body cell

Question 5

What is a haploid cell?

Answer 5

A cell with one complete set of chromosomes, sperm and ova

Question 6

How is a haploid cell formed?

Answer 6

When a diploid cell undergoes meiosis

Question 7

What is mitosis?

Answer 7

When a diploid cell divides to give rise to 2 identical diploid cells

Question 8

What is meiosis?

Answer 8

When a diploid germ cell divides to give rise to 4 non-identical haploid cells

Question 9

What is a germ cell?

Answer 9

Any cell that gives rise to gametes

Question 10

What 2 steps are involved in meiosis?

Answer 10

Meiosis 1 & Meiosis 2

Question 11

When does spermatogenesis begin?

Answer 11

At puberty

Question 12

Describe the timings of oogenesis.

Answer 12

In early foetal development - germ cells undergo mitosis to form primary oocytes

This pauses at birth

At menarche a few eggs undergo secondary meiosis every month

Question 13

What is the sperm called at each stage of spermatogenesis? And are they diploid (D) or haploid (H) at each stage?

Answer 13

Germ cell (D)
Spermatogonium (D)
Primary spermatocyte (D)
Secondary spermatocyte (H)
Spermatids (H)
Sperm cells (H)

Question 14

What is the egg called at each stage of oogenesis? And are they diploid (D) or haploid (H) at each stage?

Answer 14

Germ cell (D)
Oogonium (D)
Primary oocyte (D)
Secondary oocyte (H)
Ootid (H)
Ovum (H)

Question 15

Draw out spermatogenesis and oogenesis.

Answer 15

:)

Question 16

Describe the structural changes that occur in spermiogenesis.

Answer 16

Condensation of nuclear chromatin

Formation of tail

Development of acrosomal cap