More Genetic Diagrams Flashcards
1
Q
How many matched pairs of chromosomes in the human body?
A
23 (XX or XY)
The 23 pair determines you are male or female.
2
Q
What do males an female chromosomes have?
A
Males - XY
females - XX
3
Q
What is the chance of having a boy or girl?
A
50/50
XX + XY = x x y y = xx xx xy xy
4
Q
What gamete determines the sex?
A
The egg always has X
But the sperm can carry either a X or a Y chromosome
5
Q
What do family pedigree charts show?
A
They show the chance of having a offspring with a certain gene .
Eg Ff + Ff = F f F f = FF Ff Ff ff.
6
Q
What is the chance of an offspring having a disease if the parents are both carriers ?
A
1/4
