Meiosis

Question 1

How many functional mature sperm cells form when a single primary spermatocyte in teste undergoes meiosis

Answer 1

4

Question 2

How many functional egg cells form when a single primary oocyte in the ovaries undergoes meiosis in females

Answer 2

Four could but 3 cells form into polar bodies so only one is functional

Question 3

What is ploidy?

Answer 3

The amount of copies of a chromosome

Question 4

How many unique sperm or egg cells do humans have the probability of making?

Answer 4

2^23

Question 5

What is a chromosome made of?

Answer 5

DNA wrapped around proteins

Question 6

Difference between a chromosome and gene?

Answer 6

A gene is a segment of DNA that make up a chromosome

Question 7

Laws of segregation

Answer 7

Homologous pairs will separate from eachother

Question 8

Independent assortment

Answer 8

Maternal 1 chromosome moves into one cell paternal 1 chromosome must move into the other one but that specific pattern does not have to occur with the other chromosomes, they can split to either side as much as they want

Question 9

Gene

Answer 9

Segment of DNA that has instructions for a trait

Question 10

Allele

Answer 10

A version of a gene

Question 11

Why do some people have 3 copies of chromosome 21

Answer 11

When copied homologe separate from i other to move into opposite cells, sometimes they go into the same cell. So when one gamete now has 2 chromosome 21 and the other has 1 the offspring will have 3

Question 12

Zygote

Answer 12

Fusion of sperm+egg cells

Question 13

Purpose of Meiosis

Answer 13

To make sex cells from diploid to haploid so when the sperm fertilizes the egg it does not double chromosomes each generation

Question 14

Rules of DNA transfer from parents to offspring

Answer 14

1. Offspring can only get what the parents have to give
2. There must be one copy of each chromosome from each parent
3. Offspring must have the same number of chromosomes as the parents