Which of the following statements is true of crossing-over? A.
Only one gene may be exchanged at a time during crossing-over. B.
The gene for eye color can be exchanged with the gene for hair color during crossing over.
C.
Crossing-over contributes to genetic diversity or variation.
D.
Crossing-over always results in a non-beneficial mutation.

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.