Biologie clasa 7 man. p. 114. ex. 2

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

Akrabby blind whale has married pearl who has normal vision. oneof their two sons is also colorblind. what arr the genotypes of the parents?

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?