The significance of meiosis

HideShow resource information
  • Created by: zoolouise
  • Created on: 26-04-16 19:23
What does meiosis keep?
The chromosome number constant from one generation to the next
1 of 15
What does meiosis generate?
Genetic variation in the gametes and therefore the zygotes they produce
2 of 15
What are the two ways that meiosis generates genetic variation?
1) Crossing over during prophase I 2) Independent assorment
3 of 15
What are the two phases independent assortment occurs?
Metaphase I - daughter cells contain different combinations of maternal and paternal chromosomes. Metaphase II - daughter cells have different combinations of chromatids
4 of 15
What's the difference between meiosis I and II in Prophase?
Meiosis I follows DNA replication, Meiosis II doesn't. Crossing over occurs in Meiosis I, it doesn't in Meiosis II.
5 of 15
What's the difference between meiosis I and II in metaphase?
The alignment at the equator is different. In Meiosis I homologous pairs align on either side of the equator. In Meiosis II chromosomes align on the equator. Independent assortment occurs with homologous chromosomes for I and chromatids for II.
6 of 15
What's the difference between meiosis I and meiosis II in anaphase?
Chromosomes separate during anaphase in I, chromatids separate in II. There's 2 daughter cells in Meiosis I and 4 in Meiosis II. The cells are haploid in both meiosis I and II.
7 of 15
What's the difference between the number of divisions in mitosis and meiosos?
There's 1 division in mitosis and 2 in meiosis
8 of 15
What's the difference between the number of daughter cells in mitosis and meiosis?
There's 2 daughter cells in mitosis, 4 in meiosis.
9 of 15
What's the difference between the chromosome number in daughter cells between mitosis and meiosis?
In mitosis it's the same as the parent cell, in meiosis it's half that of the parent cells.
10 of 15
What's the ploidy of daughter cells in mitosis and meiosis?
In mitosis they're dipload and in meiosis they're haploid.
11 of 15
What's the difference in the presence of a chiasmata in mitosis and meiosis?
Absent in mitosis, present in meiosis.
12 of 15
When does genetic crossing over occur in mitosis and meiosis?
It doesn't occur in mitosis. It occurs in prophase I in meiosis.
13 of 15
When does independent assortment occur in mitosis and meiosis?
It doesn't occur in motisis. It occurs in metaphase I and metaphase II in meiosis.
14 of 15
What's the difference between the genetic composition of mitosis and meiosis?
The cells are genetically identical with the parent cell and each other in mitosis. They're genetically different in meiosis.
15 of 15

Other cards in this set

Card 2

Front

What does meiosis generate?

Back

Genetic variation in the gametes and therefore the zygotes they produce

Card 3

Front

What are the two ways that meiosis generates genetic variation?

Back

Preview of the front of card 3

Card 4

Front

What are the two phases independent assortment occurs?

Back

Preview of the front of card 4

Card 5

Front

What's the difference between meiosis I and II in Prophase?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »