What do you expect would develop if you injected Dnmt3 siRNA into honeybee larvae?
A. a female queen
B. a male drone or a female worker
C. a male drone
D. a female worker
E. a female worker or a queen
Ans: A. a female queen
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Home gardeners who grow tomatoes are often told to pinch off auxillary buds at nodes to prevent the plants from becoming too bushy. This is applicable with most tomato species because they have growth.
A. circular B. slow C. determinate D. undefined E. indeterminate
The stage of prophase I in which mammalian oogenesis can arrest for years is
A) leptotene. B) zygotene. C) pachytene. D) diplotene. E) diakinesis.
What is the best description of double fertilization in angiosperms?
A. One pollen grain fertilizes the embryo sac; the other sperm fertilizes the pollen grain. B. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the seed coat. C. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the endosperm. D. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the ovary, which becomes the fruit. E. One sperm fertilizes the egg, which develops into the embryo; the other sperm produces the pollen tube.
An analysis of the susceptibility to major depressive disorder in monozygotic twins separated at birth revealed that the broad-sense heritability of this trait is 0.10 and its total phenotypic variance is 0.25
What is the variance of the genotypic value of this disorder? Show your work. What will be an ideal response?