Consider a dihybrid cross of two true-breeding Drosophila: a male with red eyes and normal wings and a female with orange eyes and hairy wings. The F1 flies are of two types: orange eye, normal wing males and red eye, normal wing females. What can you conclude about the mutant traits, orange eye and hairy wing?
A: Both traits are recessive.
B: The eye color gene is sex-linked.
C: The wing hair trait is sex-linked.
D: Both A and B
E: Both A and C.
Answer: D: Both A and B
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Mitotic cell division in unicellular eukaryotes can result in a cell that is:
A. 1n. B. 2n. C. Either 1n or 2n, depending on whether the organism predominantly exists as a haploid cell or a diploid cell.
If you consider a DNA molecule to resemble a twisted ladder, the rungs of the ladder are paired
nitrogen bases. __________________ Indicate whether the statement is true or false.
What would a species that has a high number of alleles for many genes that are distributed throughout the population have?
A) low genetic variability B) high genetic drift C) high genetic variability D) a large amount of inbreeding depression
The genetic preservation of the features that increase the likelihood of survival and reproduction of some individuals within a population is called the process of
A. natural selection. B. creation of new species. C. inheritance of acquired characteristics. D. genetic drift. E. increasing evolutionary resistance.