Question

in a hypothetical mammal quite prone to nondisjunction, red bloodcell (rbc) shape is controlled by X-linked alleles. The followingmating produced the offspring indicated below. In each case,indicate the sex chromosome genotype (R = normal round rbc shape, r= oval shape). From the list of choices, pick probable explanationsfor the occurrence of each type of offspring.
-----Female with equal numbers of round and ovalrbcs
-----male with all round rbcs

1)female with all round rbcs
2)male with all oval rbcs
3) female with all oval rbcs
4) female with about 67% of the rbcs oval and 33%round
5) male with about 50% round and 50% oval rbcs

Possible explanations in the parent
a) Normal male meiosis, normal female meiosis
b) Normal male meiosis, anaphase I nondisjunction in femalemeiosis
c) Normal male meiosis, anaphase II nondisjunction in femalemeiosis
d) normal female meiosis, anaphase I nondisjunction in malemeiosis
e) normal female meiosis, anaphase II nondisjunction in malemeiosis

#1-5 answers come from the "Possibleexplanations in the parent" a-e