The family tree below shows the trait of color blindness. the only unknown is the mother in the first generation.

what must be true about the mother?
a. she is color-blind.
b. she has two recessive color blindness alleles.
c. she has at least one recessive color blindness allele.
d. she only has one x chromosome.

"She has at least one recessive color blindness allele" is the one statement among the following choices given in the question that is true. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has actually come to your desired help.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.