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Each chromosome consists of only one centromere, but during certain times in the cell cycle could consist of two DNA molecules (sister chromatids). If a cell in G1 of interphase has 8 chromosomes, then in G2 of interphase, how many chromosomes AND DNA molecules will be found per cell?
A newspaper story on AIDS reports that an allele (R) confers complete resistance to HIV when homozygous and that 2% of the human population is resistant (RR).
Assume if you analyzed the average size of individuals in many dog and wolf populations around the world, how would you use this to determine where and when dogs were domesticated from wolves?
What is the possibility that the son would have both the Xg antigen and ichthyosis. Why is the man a major candidate for a heart attack.
Aphids can reproduce sexually and asexually. Females reproduce by themselves and give birth to live females in summer. Describe how the reproductive variability of aphids might be an adaptation that permits them to survive very aggressive predation.
What are the three stages of activity in the life of an angiosperm pollen grain which succeeds in fertilizing an ovule with its sperm?
Discuss how can growth characteristics on a streak plate, broth culture or slant culture be used in the identification of a bacterial species or strain?
Explain an atom in terms of subatomic particles. Be sure to explain the size, charge, and location of each particle and how the number of each of those particles affects the atom.
Define and contrast individual and class characteristics of physical evidence. Explain the different types of microscopes and usefulness in crime scenes.
In cats, striped coats (S) are dominant over solid coats (s), and black fur (B) is dominant over gray (b). A cat that is SsBB is crossed with a cat that is ssBb. What are the chances of an offspring being heterozygous for both traits.
The probability that a baby will be a boy is ½ as is the probability that a baby will be a girl. Explain this fact by explaining the mechanism of meiosis in the production of gametes and the process of fertilization.
Consider two gene loci in the mouse, locus 1 and locus 2. Each locus is on a different, nonhomologous autosomal chromosome . Alleles at locus 1 influence fur color.
Compute the ratio of molecular weights of 60S and 40S ribosomal sub-units assuming that sub-units have spherical shape and the same density.
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