Using the product rule, the probability that parents heterozygous for two traits (AaBb) produce an offspring homozygous recessive for the same two traits (aabb) is
A) 1/4.
B) 1/8.
C) 1/16.
D) 1/24.
C) 1/16.
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Packages of vegetable seeds typically include an ideal planting depth. If planted too deep, the seeds will not germinate. Why will an excess depth affect the germination of the plant?
A. Circadian rhythms are disrupted. B. Thigmotropism is disrupted. C. Statoliths can no longer move. D. Phytochromes can no longer absorb light. E. The apical meristem cannot reach the surface of the soil.
The human body consists of several structural and functional levels of organisms
Cotyledons and endosperm both provide nutrition. What is the difference between them?
A) Cotyledons provide nutrition for the developing embryo; endosperm provides nutrition for the young seedling. B) Endosperm provides nutrition for the developing embryo; cotyledons provide nutrition for the young seedling. C) Cotyledons are found only in flowering plants; endosperm is found only in young ferns. D) Endosperm is found only in monocots; cotyledons are found only in dicots. E) Endosperm is always photosynthetic; cotyledons are usually not.
Approximately 5% of the cytosine residues are methylated in the genome of any given eukaryote. In what way is DNA methylation related to genetic regulation?
What will be an ideal response?