The number of ______ vary among species.
Fill in the blank(s) with the appropriate word(s).
Answer: Chromosome
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Which structure do prokaryotic cells lack?
a. nucleoid regions b. membrane-bound nuclei c. cytoplasm d. a plasma membrane e. DNA
In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. The phenotype of parents of litters with the following phenotype distribution 3 brown, 3 yellow, 1 black, 1 cream is:
a. Black and cream. b. Black and yellow. c. Brown and cream. d. Brown and yellow.
In order for transcription to be initiated
A. DNA polymerase must have access to the RNA and must also be capable of binding to the gene's promoter. B. RNA ligase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. C. DNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. D. RNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. E. RNA polymerase must have access to the DNA double helix and also must be capable of binding to the gene's operator.
Although social changes and increased access to contraceptives have caused a decrease in fertility rates in some less-developed countries, their rates are still above RLF
Indicate whether the statement is true or false