Two whippets who are both heterozygous for the mutant myostatin gene are bred.What is the likelihood that their puppies will inherit both recessive copies and develop the over-muscled phenotype?
Non-invasive prenatal testing for Down syndrome has recently been accomplished using
A) fetal cell analysis in the mother's blood. B) amniocentesis. C) saliva samples from the mother. D) chorionic villus sampling. E) free fetal DNA analysis.
In the early part of the 20ᵗʰ century,the U.S.Eugenics Office ran contests to pick families with the "best genetics".What was the basis for this program?
A) forced sterilization B) negative eugenics C) national security D) positive eugenics E) Nazi doctrine