In one type cross of black × black, the results were as follows: 9/16 black 4/16 yellow 3/16 brown The genotype aabb must result in which of the following?
A) Black
B) Brown
C) Yellow
D) A lethal result
Ans: C) Yellow
Biology & Microbiology
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A polar receptor is positively charged.
a. true b. false
Biology & Microbiology
In the disease hemophilia A, a male with a recessive allele ____
a. is classified as a carrier b. is always affected c. has normal clotting unless the situation is severe d. carries the trait on two chromosomes e. has a 100% chance of passing the trait to his son
Biology & Microbiology
Undifferentiated cells that can divide and specialize to form a variety of different cells are called:a
differential cells. b. mother cells. c. somatic cells. d. stem cells. e. morphogens
Biology & Microbiology
Compared with modern humans, Neanderthals had all the following features except:
A. Tall, thin body B. Stockier build C. Thicker bones D. Bulkier muscles E. Shorter stature
Biology & Microbiology