embryology phases

Question 1

gametogenesis

Answer 1

formation of a gamete. consisting of mitosis and meiosis-leading to genetic variation.

Question 2

Oogenesis

Answer 2

formation of female gametes. starts in development and ends at menopause. primary oocytes begin meiosis at 28-30 weeks but arrest in prophase until puberty.

Question 3

Spermatogenesis

Answer 3

Formation of male gametes. occurs at puberty and continues throughout life.

Question 4

fertilisation

Answer 4

union of gametes, fusion of sperm and oocyte, formation of a zygote

Question 5

Cleavage

Answer 5

period of rapid mitotic cell division, no increase in size, formation of morula then blastocyst (days 1-4)

Question 6

organogenesis

Answer 6

basis of these all in place by end of embryonic period.