Suppose you discover a new species of worm that exists in two forms—slimy and nonslimy. You find that mating slimy females to nonslimy males produces offspring consisting of slimy males and nonslimy females, whereas mating nonslimy females with slimy males produces offspring of both sexes that are all slimy. You would conclude that the ________ allele is dominant and that ________ are the heterogametic sex (the sex with two different sex chromosomes) in this species of worm.
A) slimy; females
B) slimy; males
C) nonslimy; females
D) nonslimy; males
A) slimy; females
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Mutation rates of human genes are expressed as the number of ____
a. nucleotides substitutions per gene b. frameshift mutations per genome c. mutated alleles per genome d. induced mutations per generation e. mutated alleles per gene in each generation
If a trait is genetically determined, the correlation between DZ twins should be lower than that for MZ
twins. Indicate whether the statement is true or false.
A survivorship curve that shows a population producing very few offspring, each of which has a high probability of surviving to adulthood, is typical of
A) sea stars. B) elephants. C) oysters. D) rodents.
All materials passing from one hyphal cell to another must diffuse across the septal wall.
Answer the following statement true (T) or false (F)