Which of the following facts supports the argument that early gestation is the most important time of pregnancy? O A fetus is smaller than a fingernail when it is implanted.
O The placenta is formed during the first trimester.
O Development occurs during every trimester of pregnancy.
O Nutrition is delivered to the fetus through the placenta.

Imagine you are a geneticist interested in studying a newly discovered species of very colorful birds. you have found that a single gene is responsible for their beautiful colors and that yellow birds are homozygous for the yellow allele, blue birds are homozygous for the blue allele and green birds are heterozygous for these alleles. you focused your efforts on studying one specific population and counted 9% yellow, 49% blue and 42% green birds. what are the allele frequencies in this population? \