A testcross is used to
a. determine if a parent with a dominant trait is heterozygous or homozygous.
b. determine which allele is dominant.
c. determine if the progeny of an experimental cross will get a random assortment of alleles.
d. prove that an organism is true-breeding.
e. cross an individual with a dominant phenotype with a homozygous dominant individual to
prove the alleles are indeed dominant.
A
You might also like to view...
Swarming in polychaetes for reproduction appears to be timed by:
a. biorhythms of the animals. b. lunar cycle and tides. c. solar cycle and tides. d. temperature. e. current direction.
The net ATP production in glycolysis is only two because
A. two ATPs are used to "activate" glucose, while four ATPs are produced in remaining glycolysis steps. B. two ATPs are used to donate electrons, in order to move NADH into the mitochondria. C. that is all the ATPs "loaded" with phosphates during glycolysis. D. that is the needed number of ATPs to power the reactions of the Krebs cycle. E. None of the answer choices is correct
All animals convert food nutrients to
a. carbohydrates. b. lipids. c. proteins. d. nucleic acids. e. all of these.
If a plant could not get enough phosphorus, then it could not make ________
A) carbohydrates B) ATP C) fat D) vitamin A