In cats, short hair L is dominant to long hair l,
and black hair B is dominant to brown hair b.
If you found a black, short-haired cat, you
could determine his genotype by crossing it to
an animal with a genotype of
a. LLBB.
b. llBB.
c. llBb.
d. llbb.
e. LLbb.
D
You might also like to view...
Antibodies are formed by which cells of the immune system? Select all correct choices
A. phagocytes B. B cells C. natural killer cells D. T cells E. mast cells
If AaBb plants self-fertilize, what proportion of the progeny will have exactly one dominant allele?
a. 1/16 b. 3/16 c. 4/16 d. 6/16 e. 8/16
A microarray is a tool used in genetic research to determine the mRNAs being produced in a particular tissue, and their relative level of expression. Known genes can therefore be assayed for their expression in different situations
One use of the technology is in cancer diagnosis and treatment. If a known gene functions as a tumor suppressor, predict which of the following pieces of evidence would be most useful in diagnosis of a cancer due to a mutation in this tumor-suppressor gene. A) The tissue sample shows a high level of gene expression relative to a control (noncancerous) sample. B) The tissue sample responds to treatment with a mitosis-promoting compound. C) The mRNAs for the targeted tumor suppressor sequence are not being produced. D) The mRNAs for cyclins and kinases show unusually high levels of expression.
What is one mechanism by which a mutation can cause melanoma?
A) by the production of an altered BRAF protein that keeps melanocytes moving through the cell cycle B) by causing the accumulation of Huntington protein in melanocytes, which keeps them moving through the cell cycle C) by causing the accumulation of altered BRAF protein in germ-line cells D) by preventing the BRAF protein from being able to repair damaged DNA