1. What trends do you observe with regard to temperature, precipitation, and latitude? Are the relationships between these three conditions direct? If so, how? If not, why not?
1. What trends do you observe with regard to temperature, precipitation, and latitude? Are the relationships between these three conditions direct? If so, how? If not, why not?
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6. Colorblindness is a phenotype caused by an X-linked, recessive allele (Xb). Jonathan is colorblind, but his mother is not. Which of the following is a possible genotype of his mother? (Here, XB refers to the dominant, X-linked allele that does not cause colorblindness.)
A. | Xb Xb | |
B. | XB Xb | |
C. | XB XB | |
D. | Xb Y |
7. If Jonathan's mother has another son with Jonathan's father, who is not colorblind, what is the probability that her new son will also be colorblind? (Hint: Complete a Punnett square for Jonathan's mother and father.)
A. | 0% | |
B. | 25% | |
C. | 50% | |
D. | 100% |
8. In Nina Jablonski's article, she explains that dark skin pigmentation in humans was historically a beneficial phenotype in __________ environments. (More than one answer may be correct!)
A. | high UVA | |
B. | low UVA | |
C. | low latitude (tropical) | |
D. | high latitude (polar) |