A particular cross gives a modified dihybrid ratio of 9:7. What phenotypic ratio would you expect in a testcross of the fully heterozygous F1 crossed with the fully recessive type?
A) 2:3 B) 1:3 C) 2:1 D) 1:1 E) 3:1
Answer: B
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You and your friends are hiking the Appalachian trail in North Carolina. You run out of water and your friends want to fill up from a beautiful clear stream in the middle of the forest. What precautions should you take before drinking the water and why?
What will be an ideal response?
Characteristics of all the members of the family Enterobacteriaceae include
What will be an ideal response?
An optimal strategy for an animal in procuring food would involve all of the following EXCEPT:
a. securing essential nutrients. b. maximizing the size of each prey item. c. minimizing the risk of predation during foraging and feeding. d. maximizing energy gained. e. minimizing energy expended.
Let "A" be the allele for brown eyes and "a" the allele for blue eyes. A blue-eyed man marries a woman who is heterozygous for eye color. What is the expected chance their child will be homozygous recessive?
a) 100% b) 75% c) 25% d) 50% e) 0%