In maize, some alleles at the seed coat locus influence our ability to visually determine the endosperm color phenotype
Specifically, an opaque seed coat prevents us from seeing the endosperm within, while we can readily see the endosperm in seeds with transparent coats. The opaque coat color allele thus appears to mask the expression of endosperm color alleles, providing an example of A) codominance.
B) pleiotropy.
C) polygenic inheritance.
D) epistasis.
E) maternal effect.
D
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describes the cellular activity associated with the actual passage of a nerve impulse? a. electrical discharge b. action of sodium-potassium pump c. positive feedback d. hyperpolarization followed by rebalancing e. active transport of ions
According to Mendel, what kinds of genes
“disappear” in F1 pea plants? a. sex-linked b. dominant c. recessive d. codominant e. lethal
Diploid cell formed by the union of two gametes; the product of fertilization.
What will be an ideal response?
Like the nitrifying bacteria, the crenarchaeon Nitrosopumilus maritimus can aerobically oxidize ammonia into nitrite. HOWEVER, N. maritimus
a. cannot solely depend on this physiology to obtain nitrogen. b. is more dominant in the oligotrophic open ocean than nitrifying bacteria. c. is found only in hot, aquatic environments. d. uses CO2 as its sole carbon source whereas nitrifying bacteria do not.