BIO 116 23-24 question with complete solution graded A+

In the punnett square below, the parents are heterozygous for the gene that determines ear size, where "A" = dominant allele for big ears and "a" = recessive allele for small ears. Assuming simple dominance, what percentage of their children will have big ears? - 75% Word segment that means "to divide": - CleavIn fetal circulation, which anatomical structure bypasses the lungs by shunting blood from the right to the left atrium? - Foramen ovale Which hormone inhibits uterine contractions and relaxes the pelvic ligaments? - Relaxin At the end of week _____ the embryonic stage has ended and the fetal stage has begun. - 8 In the fetus, the blood vessel that connects the umbilical vein to to the inferior vena cava, bypassing the liver is the: - Ductus venosus What is the name of the hormone secreted by the placenta which aids in the stimulation of breast development and prepares the mammary glands to secrete milk? - Placental lactogen The first true diploid cell of the future baby: - Zygote A molecule involved with aging that takes electrons from other molecules which destabilizes them and starts a chain reaction of chemical instability that could kill the cell: - Free radical Missing or gaining an extra chromosome (e.g. trisomy 21) is known as: - Aneuploidy Word segment that means "navel": - UmbilAssume simple dominance. Furthermore, assume that dominant allele "S" is for smooth skin, and recessive allele "s" is for bumpy skin. If parents with Ss and SS genotypes were to mate, what percent of their offspring will have bumpy skin? - 0%