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B6: Quiz 4
B6: Quiz 4
1)
a) How many chromosomes are there in a normal human cell?
b) How many chromosomes are there in a human gamete?
c) For humans, it is the 23rd chromosome that determines the sex of an individual.
i) What is the 23rd pair of chromosomes for females?
ii) What is the 23rd pair of chromosomes for males?
d)
i) With respect to the 23rd chromosome, what are the gametes produced by females?
ii) With respect to the 23rd chromosome, what are the gametes produced by males?
2) We have the Punnet square below where the male is on the left and the female is on the top.
a) Complete the Punnett square.
b) How many of the offspring will be female?
c) How many of the offspring will be male?
d) Write the ratio of female offspring to male offspring. Give your ratio in its simplest form.
3) This question will be very similar to the previous question – it is just showing the offspring outcomes on a different diagram.
The diagram below shows how the sex of offspring is determined.
b) How many of the offspring will be female?
c) How many of the offspring will be male?
d) Write the ratio of female offspring to male offspring. Give your ratio in its simplest form.
3) This question will be very similar to the previous question – it is just showing the offspring outcomes on a different diagram.
The diagram below shows how the sex of offspring is determined.
a) Complete the diagram.
b) What is the percentage chance that the offspring will be female?
b) What is the percentage chance that the offspring will be female?