BIO 116 questions with correct answers

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? Answer 75% Word segment that means "to divide": Answer Cleav- In fetal circulation, which anatomical structure bypasses the lungs by shunting blood from the right to the left atrium? Answer Foramen ovale Which hormone inhibits uterine contractions and relaxes the pelvic ligaments? Answer Relaxin At the end of week _____ the embryonic stage has ended and the fetal stage has begun. Answer 8 In the fetus, the blood vessel that connects the umbilical vein to to the inferior vena cava, bypassing the liver is the: Answer 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? Answer Placental lactogen The first true diploid cell of the future baby: Answer Zygote A molecule involved with aging that takes electro