A crossover that would result in genetic recombination (e.g., A b c or a B C) could involve which pair of chromatids? (Select all that apply.)
Consider a pair of homologous chromosomes heterozygous for three genes (e.g. A B C / a b c) during prophase I of meiosis. Let the sister chromatids of one homolog be numbered 1 and 2; and the sister chromatids of the other homolog be numbered 3 and 4.
A) 1 & 2
B) 3 & 4
C) 1 & 3
D) 2 & 4
E) 1 & 4
F) 2 & 3
C) 1 & 3, D) 2 & 4, E) 1 & 4, F) 2 & 3
You might also like to view...
The shape of a virus is determined by
its DNA. its RNA. its envelope. its host. its coat protein organization
In Figure 47-1, dentin is labeled as number:
a. 1
b. 2
c. 3
d. 4
e. 5
What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years?
a. marine snail fossils high up in the Andes mountains b. bird fossils at the top of mountains in Argentina c. dinosaur bones in the Amazon basin d. impressions of ocean waves at the top of a mountain
Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The presence of these organelles tells you that the environment ________
A) is isotonic to the protozoan B) is hypotonic to the protozoan C) is hypertonic to the protozoan D) contains a higher concentration of solutes than the protozoan