chapter 10.5 bio the life cycle

Life cycle refers to all reproductive events that occur?

From now generations to the next similar one

Is gamets diploid or haploid

Diploid

In males meiosis is a part of?

Spermatogensis witch occurs in testes and produce sperm

In females meiosis is apart of

Oogensis witch occurs in the ovaries and produces eggs

Ferelization ?

Restores diploid number of chromosomes

Primary spermatocytes ?

Is with 46 chromosomes and undergo meiosis 1 to form 2 secandory spermatocytes

Each with 23 duplicated chromosomes

Secandory spermatocytes

Secandory spermatocytes ?

Undergo meiosis 2 to produces 4 permatids with 23 chromosomes.

Spermatic do what

Then determine into visible sperm (spermatozoa)

What’s produced by meiosis that is spermatgensis and ogensis

Sperm and egg

What’s the result of sperm and egg fusing

Zygote

Zygotes diploid has?

Genes from both parent and ogensis

Overvaries contain stem called organic during fetal development, organic produces primary oocytes by mitosis is

Before birth

Primary oocytes begin……

Oogenesis but only a few continue at sexual maturity of female.

After birth steps fill in blank 1.Meiosis 1 of primary oocytes forms a secondary oocytes and a polar body 2._____________________ 3. If there are no sperm the secondary ooegele degenerates 4.__________________

2 the secandory oocytes begins mioesosis 2 but stops at metaphase 2, leaves ovary enters uterine tube.

4.if there are sperm in the uterine tube it triggers the secandory oocytes to complete meiosis 2 and another polar body

Polar body’s are what

A way to dispose of chromosomes while retaining much of the cytoplasm in the egg.

Cytoplasmic molecules and organelles are needed by

A developing embryo following fertilization

Some zygotes like the centrosome are?

Contributed by the sperm