Lab practical 3 (pt1): meiosis powerpoint

Question 1

Question 2

___ - A special type of cell division that can produce reproductive cells, i.e. sperm and egg cells (gametes)

Two rounds of cell division ___ and ___

Cells produced from meiosis are ___ to the original cell nor to other cells produced via meiosis

Cells produced by meiosis contain ___ the genetic material of the original cell!

Answer 2

meiosis

Meiosis I and Meiosis II

NOT genetically identical

half

Question 3

Human somatic cells (any cell other than a gamete) have ___ pairs of chromosomes​

The two chromosomes in each pair are called ___, or homologs​

Chromosomes in a homologous pair are the same length and carry genes controlling the same inherited characters

Answer 3

23

homologous chromosomes

Question 4

Question 5

Each pair of homologous chromosomes includes one chromosome from each parent​

A ___ cell (2n) has two sets of chromosomes​

A gamete (sperm or egg) contains a single set of chromosomes, and is ___ (n)

Answer 5

diploid

haploid

Question 6

In a cell in which DNA synthesis has occurred, each chromosome is replicated​

Each replicated chromosome consists of two identical ___

Answer 6

sister chromatids

Question 7

A ___ is a pair of homologous chromosomes(each consisting of duplicated sister chromatids)​
​
(the pair consist of one paternal and one maternal chromosome)​

Answer 7

tetrad

Question 8

At sexual maturity, the ovaries and testes produce ___

___ are the only types of human cells produced by meiosis, rather than mitosis​

Meiosis results in one set of chromosomes in each gamete (gametes are haploid)​

Answer 8

haploid (n) gametes​

Gametes

Question 9

Like mitosis, meiosis is preceded by the ___

Meiosis takes place in two sets of cell divisions, called ___

The two cell divisions result in ___, rather than the two daughter cells in mitosis​

​

Answer 9

replication of chromosomes​

meiosis I and meiosis II​

four daughter cells

Question 10

The first cell division (meiosis I), results in 2 haploid cells (each daughter cell only has one set of duplicated chromosomes)​

Crossing over in prophase I: Homologous chromosomes (tetrads) physically connect and exchange genetic information​

At the metaphase plate in metaphase I, there are paired homologous chromosomes that line up​

At anaphase I, it is homologous chromosomes that separate​

​

Answer 10

Question 11

In the second cell division (meiosis II), sister chromatids separate​

The two cell divisions result in four daughter cells, rather than the two daughter cells in mitosis​

Each daughter cell has only half as many chromosomes as the parent cell​

Meiosis II is very similar to mitosis( Separation of sister chromatids at anaphase II)​

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Answer 11