Reproductive EX43

Normal # of chromosomes in most humans

Normal # of chromosomes in most humans

46, the diploid or 2n

How many Ch do you get from each parents (Hint: equals 46 total)

23 Ch

Each gamete contains ____ chromosomes, the _____ or n

23, haplpid

Zygote divides by

mitosis

Mitosis produces

2 diploid daughter cells

Gametogenesis

• Involves meiosis, which reduces the # of Ch by 1/2

process of gamete formation

Before meiosis, the Ch in _______ cells are ______ . The identical copies remain together as ______ _____

mother; replicated; sister chromatids

Sister chromatids are held together by a centromere, forming a structure called

dyad

Meiosis I is the _____ of division of meiosis

reduction

Occurs during synapse when the free ends of maternal + paternal cells wrap around eachother, forming a

Chiasmata

Allows maternal + paternal Ch to exchange genetic material

crossing over

Net result of Meiosis II is

4 haploid daughter cells

Net result of Meiosis I is

2 haploid daughter cells

Found at tubule periphery to build up stem cell line

spermatogonia

Under what hormone released by the anterior pituitary gland has production of 1 spermatogonium & one primary spermatocyte

FSH

A cell that extends inward from the periphery of the tubule & nourishes spermatids as they turn into sperm

sustentocyte/Sertoli cell

Btwn the seminiferous tubules & is promoted by LH, which works mutually w/FSH to stimulate sperm production

Interstitial endocrine cells/Leydig cells

In meiosis for females, only _ functional gamete is produced

1

Only in mitosis can there by

product of 2 diploid daughter cells, occur throughout body, & allowance of cells for growth + repair

Product of

1. Meiosis I

2. Meiosis II

3. Providing nutrients to developing sperm

1. secondary spermatocyte

2. spermatid

3. sustenocyte

Spermatogenesis

forming of haploid gametes by the male, products is 4 spermatids

Spermigenesis

excessive spermatid cytoplasm is sloughed off to form a motile functional sperm

What hormones are produced by corpus luteum?

Progesterone + Estradiol

In uterine tube BEFORE ferilization

In uterine tube AFTER ferilization

secondary oocyte

ovum

Final products of oogenesis

1 secondary oocyte & 3 polar bodies