A red blood cell is in the umbilical artery of a fetus. Where will it flow next, in the proper order?

A) Umbilical vein; chorion; ductus arteriosus

B) Chorion; umbilical vein; ductus arteriosus

C) Chorion; umbilical vein; ductus venosus

D) Umbilical vein; chorion; ductus venosus

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a