Science Study Guide Pt 2 Flashcards
Mitosis
a process in which one diploid cell divides and makes four haploid sex cells. there is only one interphase in meiosis
4 daughter cells are produces in meiosis but…
they are not identical to the parent cell or to eachother.
A parent cell is either diploid or haploid
Diploid
A daughter cell is either diploid or haploid
Haploid
Reproductive cells are either diploid or haploid
Haploid
How many chromosomes does human sperm have?
23
How many chromosomes does an egg have?
23
How many chromosomes does a zygote have once fertilization takes place?
46
The difference between haploids and diploids
Haploids have HALF as many chromosomes as diploids.
Crossing over
Chromosomal segments are exchanged between two homologous chromosomes
Crossing over occurs in which phase of meiosis?
Prophase 1
Meiosis is important because…
it produces 4 haploid cells that are not identical to each other, increasing genetic variation
How many haploid cells are produced during meiosis?
4
How many nuclear division are produced in meiosis?
2
homologous chromosomes
pairs of chromosomes that have genes for the same traits listed in the same arranged order
homologous chromosomes are seperated in which phase of meiosis?
Anaphase II
25 cells go under ____, ___ daughter cells are reproduced
- meiosis 2. 10
The parent cell is a (diploid/haploid) at the start of meiosis.
diploid
The daughter cells are produced from meiosis are diploid are haploid?
haploid
Fertilization
A process in which an egg and sperm cell join
Zygote
a new cell that forms from fertilization
Sexual Reproduction
a type of reproduction in which genetic materials from 2 diff cells combine
Sexual Reproduction involves meiosis or mitosis?
Meiosis
Meiosis produces ______
gametes (egg and sperm cells)
