Section number and TA’s name:_________________
Feb 7/8 in your discussion section.
(not hand-write) your answers onto the question sheet itself
(this sheet). Please
highlight or otherwise indicate the parts that you have typed with
ing. If additional working is required, it will be specifically stated so
in the question, and whether the working should be shown on the answer sheet or a
supplemental sheet will also be stated.
See attached page
1 Point for crossover, 1 Point for both parental centromeres segregate together
2. The diploid chromosome number in humans is 46 (23 pairs), and one member of each
chromosome pair is present in each gamete.
a. If we ignore for now the possibility of crossing over, how many different combinations
of maternal and paternal chromosomes can be found in human gametes?
N=23, you can come up with million of different combinations such as #1M, #2P,
#3P, #4P, #5P, #6P, #7P, #8P, #9P, and so on to the last chromosome,
#23P. The formula is: Possible combinations = 2
, here it would be
8,388,608 (Assuming no crossing-over)