Question

Down syndrome is a condition in which the individual has which chromosome?
A. 3 copies of chromosome 23
B. 3 copies of chromosome 21
C. Lacks chromosome 46
D. Has only one chromosome 21

Answer 1

hey answer ma question
Which of the following is an example of a long-term climatic change? 
       A. Winter   B. Summer   C. Ice age   D. La Niña