How do scientists know that proofreading occurs during and after the DNA replication process?
What will be an ideal response?
DNA polymerase mismatches bases about once in every 10,000 to 1 million base pairs, but the actual mutation rate is one mistake in every 100 million to 10 billion base pairs.
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The Punnett square illustration below shows that
theoretically a. half of human sperm carry a Y chromosome. b. half of human zygotes are XY. c. all zygotes carry an X chromosome. d. gender depends upon which type of sperm fertilizes the egg. e. all of these are true.
Effects of Indigenous Microbes
What will be an ideal response?
Hypothyroidism during infancy and childhood can lead to a condition of retarded mental and physical developmentcalled:a
dwarfism. b. gigantism. c. acromegaly. d. myxedema. e. cretinism
The most common type of connective tissue in the human body is
A) fibrous connective tissue. B) adipose tissue. C) loose connective tissue. D) bone.