Reduction-Division
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4

Answer:

10 chromosomes (haploid or 1n)

Slide 42

Karyotype

An organized picture of the chromosomes of a human arranged in pairs by size from largest to smallest.

Pairs 1-22 called AUTOSOMES

Last pair are SEX CHROMOSOMES

Male - XY

Slide 43

Karyotype

Female - XX

Slide 44

Karyotype

Female - XX

Down Syndrome – Trisomy 21

Slide 45

The fusion of a sperm and egg to form a zygote.

A zygote is a FERTILIZED EGG

Slide 46

Question:

A cell containing 40 chromatids at the beginning of meiosis would, at its completion, produce cells containing how many chromosomes?

Slide 47

Answer:

10 chromosomes

Slide 48

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