More Genetic Diagrams P8 Flashcards
1
Q
How many chromosomes are there in every human body cell?
A
23 pairs
2
Q
Which pair is the sex chromosome?
A
23rd pair
3
Q
What do the 23rd pair decide?
A
Whether you are male or female
4
Q
How is a males 23rd pair labelled?
A
XY
5
Q
How is a female 23rd pair labelled?
A
XX
6
Q
What does the Y chromosome gene do?
A
It carries a gene which makes an embryo develop into a male as it grows, by stimulating the growth of testes.
7
Q
See page 8 for how family trees can also show single gene inheritance and for the question on this section.
A
.
