Problem:

Question 1: Two new species of plants have been discovered. One has 2n = 10 chromosomes, and a close relative has 2n = 14. You have created a hybrid between them and suspect that it is an allotetraploid. If you are right, what possible chromosome numbers could the hybrid have?

Question 2: Red-green color blindness is a human X-linked recessive disorder. A young man with a 47,XXY karyotype (Klinefelter syndrome) is color blind. His 46,XY brother also is color blind. Both parents have normal color vision. Where did the nondisjunction occur that gave rise to the young man with Klinefelter syndrome?

Show your calculations, but you do not need to write out any explanation.