11.1 sexual reproduction requires meiosis Flashcards
1
Q
Gametes
A
- egg & sperm
- haploid reproductive cell
- each gametes contain two chromosomes
2
Q
somatic cells
A
- “nonreproductive cells”
- cells of a multicellular organism
- of embryos & mature individuals contain four
3
Q
zygote
A
- diploid (2n)
- an egg and a sperm fuse to produce single cell called zygote
- has two copies of each chromosome
4
Q
fertilization or syngamy
A
-fusion of two haploid gamete nuclei to form a diploid zygote nucleus
5
Q
Meiosis
A
- produces cells with half normal number of chromosomes
- meiosis occurs during gamete formation
6
Q
What constitutes a cycle of reproduction
A
- Meiosis
- fertilization
7
Q
diploid cells
A
-two sets of chromosomes in somatic cells of adults
8
Q
haploid cells
A
-only one set of chromosomes in gametes
9
Q
sexual reproduction
A
-involves alteration of meiosis and fertilization
10
Q
germ-line cells
A
- during zygote development;
- cells are set aside from somatic cell that will undergo meiosis to produce gametes
- only capable of meiosis
10
Q
Gamete-producing germ line cells produce what type of gametes in meiosis?
A
- haploid gametes
- although germ line cells are diploid but produce haploid gametes
