What is one of the cellular differences between human eggs and sperm?
A) Sperm are arrested in meiosis II; eggs have completed meiosis.
B) Sperm contain a haploid set of chromosomes; eggs are diploid.
C) Sperm have 200,000 times the volume of eggs.
D) Eggs have 200,000 times the volume of sperm.
E) Sperm are arrested in meiosis I; eggs have completed meiosis.
Answer: D
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Linked genes
A. are alleles that are found in different daughter cells. B. have no alleles. C. have more alleles than usual. D. are found on the same chromosome. E. are found in the same species.
You're interested in the genetics of earlobe shape on your campus. Free (unattached) earlobes are caused by a dominant allele. The attached earlobe phenotype is caused by a recessive allele
Individuals with free earlobes have either a homozygous genotype or a heterozygous genotype. Assuming that your college campus is a stable population, what calculation would you use to determine the percentage of students who have a heterozygous genotype for earlobe shape? A) Calculate the percentage of people who have free earlobes. B) Calculate the percentage of people who are homozygous-dominant for free earlobes. C) Calculate the percentage of people who have attached earlobes. D) Calculate the percentage of people who carry the recessive allele.
Liquid water ________.
A) is less dense than ice B) has a specific heat lower than that of most other substances C) has a heat of vaporization higher than that of most other substances D) is nonpolar
Impetigo can be caused by
A) Staphylococcus aureus. B) Staphylococcus epidermidis. C) Streptococcus pyogenes. D) both Staphylococcus aureus and Streptococcus pyogenes. E) both Staphylococcus epidermidis and Streptococcus pyogenes.