During a human pregnancy, implantation begins at which stage?
a. zygote
b. early cleavage
c. blastocyst
d. fetus
e. morula
c
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In Hashimotos's disease, autoantibodies are made against ________, a product of the thyroid gland
A) bacteria B) hemoglobin C) thyroglobulin D) viruses
The reason that the HD allele acts as a dominant allele is that
A) the HD mutation results in a protein that can damage nerve cells even in the presence of the normal protein. B) the normal HD allele does not normally produce a protein but the mutant HD allele does. C) the mutant HD allele suppresses protein production from the normal HD allele. D) the protein produced from the mutant HD allele is nonfunctional.
Which type of muscle fibers is known as dark meat in chickens? a. White b. Both red and white c. None of these choices
d. Red e. Neither red nor white
Compare and contrast the following pairs of related terms: gene and allele, genotype and phenotype, homozygous and
heterozygous. What will be an ideal response?