Gametic incompatibility is an example of
A) hybrid inviability. B) a premating isolating mechanism.
C) a geographic isolating mechanism. D) a postmating isolating mechanism.
D
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Substances that cause birth defects are collectively called
A. androgens. B. prostaglandins. C. teratogens. D. follicle-stimulating hormones. E. None of the answer choices is correct.
In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
spotted (s). If two dihybrids (Bb Ss) were crossed, what fraction of the black, solid offspring would be homozygous? a. 4/16 b. 9/16 c. 1/9 d. 3/16 e. 3/4
Competition for belowground resources is considered to be asymmetric because larger plants have a disproportionate advantage in competition for those resources
Indicate whether the statement is true or false
How many chromatids would you expect to find in a dividing diploid cell whose haploid number is 5 at that stage of the mitotic cycle when the nuclear membrane disappears?
What will be an ideal response?