Cell Division By Meisosis

Question 1

Where does meiosis only take place?

Answer 1

= sex orgams
= produces gametes

Question 2

What is the summary of what we start and end with?

Answer 2

= start diploid cell
= ends with 4 haploid gametes, as when fertilisation happens with 2 gametes this forms a zygote diploid cell

Question 3

Are the 4 daughter cells in meosis geneticallt identical or varied?

Answer 3

=genetically varied

Question 4

What are a homologous pair of chromosomes?

Answer 4

= pair of chromosomes
= one of the chromosome comes from the father
= one of the chromosome comes from the mother
= have the exact same gene, inherit different alleles from the parent
= `

Question 5

Why are the gamates produced in meiosis genetically different? (crossing over)

Answer 5

= all the chromosomes are copied, sister chromatids joined by the centromere
= the 2 chromosomes in homologous pair join together and the chromatids wrap around eachother
=parts of the chromatids can break off and and exchange between homolgous chromosomes
= exhanged DNA
= recombinent chromsoomes

Question 6

What are the attached pair of chromosomes called?

Answer 6

bivalent

Question 7

What are the points where the chromatids joined together?

Answer 7

= chiasmata

Question 8

What else can happen during crossing over?

Answer 8

= exchanging alleles

Question 9

What then causes the genetic variation?

Answer 9

= exchange of alleles