During a third trimester ultrasound, what would a doctor expect to observe in a fetus

A. initial development of organs

B. response to noise and light

C. presence of a tail-like structure

D. the first heartbeat

the answer to your question is slate

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.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?