Which one goes with which?

Which is true of the regious near earth equator

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?