Lecture 22 Flashcards
0
Q
What do the ovaries and testis produce through meiosis?
A
An ovum and sperm cells
1
Q
Do humans have haploid cells or diploid cells?
A
Diploid (2n = 46)
2
Q
Are sperm cells and ovums haploid or diploid?
A
Haploid (n =23)
3
Q
What do the sperm cell and ovum go through?
A
Fertilisation
4
Q
What does the fertalization of the ovum and sperm produce?
A
A zygote
5
Q
Is a zygote haploid or diploid?
A
Diploid (2n = 46)
6
Q
What is in the cell during the interphase if meiosis?
A
- centrosomes with centriole pairs
- chromatin within a nuclear envelope
7
Q
What is happening in the cell during Prophase 1?
A
- spindles form from centrosomes
- chiasmata holds chromosomes together side by side
- exchange of genetics material (crossing over)
8
Q
What are two homologous pairs of chromosomes called?
A
A tetrad
9
Q
What happens during the metaphase 1?
A
- microtubules attach to kinetochore
- lines tetrads up on metaphase plate
10
Q
What happens during the anaphase 1
A
- homologous pairs of chromosomes split up to each pole
- sister chromatids remain together
