How many total chromosomes does a human gamete have?

What should be the outcome of normal portal vein evaluation when scanning a liver allograft?

Which of the following in NOT a common cause of liver transplant? 

What is the gold standard for evaluation of renal allograft rejection?

The most common obstructive bowel disorder of early childhood occurs when a segment of bowel prolapses into a more distal segment and is called what?

Consider the following images of a premature male infant that suffered from, respiratory distress, sepsis, and anemia:   What is the anatomical location of the abnormality that is noted just underneath the left lateral ventricle in the images above?

The germinal matrix normally regresses at what gestational age

Using a lateral approach to scanning the neonatal head and sending ultrasound through the temporal horn demonstrates which anatomic plane?

Please Indicate the scanning plane from this image:

A group of butterflies from one meadow migrates and mates with butterflies from a neighboring meadow. Over time, the genetic makeup of both populations becomes more similar due to the movement of individuals between them. Which evolutionary process is responsible for this change?