How many genetic disorders are known
a. three
b. about 20
c. about 100
d. thousands

Are the earth's ocean floor and continents the same age geologically? why or why not?

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.