Barney and betty are about to have their first child. they both have "normal" feet but barney's father has flat feet and betty has a child from a previous marriage who has flat feet, meaning they are both heterozygous for the trait. what is the probability that they will have a boy with flat feet(recessive trait)? 25% 75% 100% 50%

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.