In cultivated stocks, the cross of a variety of white flower plants produced all red flowers in the F1
generation, but the F2 generation produced 87 red flowers, 31 cream flowers, and 39 white flowers.
Explain these results by giving the genotypes possible for each phenotype. What will be an ideal response?
R-red, r-cream, A-pigment, a-albino
9 R_ A_ red, 3 rr A_ cream, 4 _aa white
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Some of the intestinal symptoms elicited by pathogens such as Salmonella, Shigella, and Escherichia are due to the presence of
A) pseudomurein. B) S-layers. C) lipopolysaccharides. D) peptidoglycan.
Your mother has albinism, which is a recessive trait. Your father has cystic fibrosis, which is also a
recessive trait. You just got married and discover that your new father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have both albinism and cystic fibrosis?
a. 1/16. b. 1/8. c. 1/4. d. 1/2. e. 0.
Which of the following are the male gametophytes in flowering plants?
a. stamens b. sperm c. shoot parts bearing male flowers d. pollen grains e. anthers
What is the term for an observable trait of an organism?
A) allele B) genotype C) hybrid D) phenotype E) element