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x and y chromosomes (genetic diagrams shows the possible combination of…
x and y chromosomes
genetic diagrams shows the possible combination of gamete
3) put the possible gametes from one parent down the side and those from the other parent along the topn
4) then in each middle square you fill in the letters from the top and side that line up with the square the pars of letters in the middle show the possible combinations of the gametes
2) genetic diagrams are just models that are used to show all the possible genetic outcomes when you cross together different genes or chromosomes
5)thers are two xx results and two xy results so theirs the same probability of getting a boy or girl
1)to find the probability of getting a boy or girl you can draw a genetic diagram
6) 50;50 ration is only probability at each pregnancy
control whether your male or female
2) of theses 22 are matched pairs of chromosomes that just control characteristics
3) the 23 pairs are labelled xx or xy
1) there are 23 pairs of chromosomes in every human body cell
4) they are two chromosomes that decide your sex where you turn out male or female
more than one type of genetic diagrams
2) the middle circles show the possible gametes that are formed one gamete from the females combines with one gamete the male
3) the criss cross lines show all the possible ways the x and y chromosomes could combine the possible combination of the offspring are shown in th bottom circles
1) at the top are the parents
4)remember only one of these possibilities would actually happen for any one offspring
which is which
females have two x chrisoms xx the xx combination allow female characteristics to develop
males have an z and a y chromosome xy the y chromosomes cause male characteristics