Down syndrome and other disorders where there are extra or missing copies of a chromosomes are the consequence of:
a) mitosis.
b) sex determination.
c) fertilization.
d) nondisjunction.
e) crossing over.
Answer: d) nondisjunction.
Down syndrome and other disorders where there are extra or missing copies of a chromosomes are the consequence of:
a) mitosis.
b) sex determination.
c) fertilization.
d) nondisjunction.
e) crossing over.
Answer: d) nondisjunction.