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Q. Consider two X-linked loci, A/a and B/b. The A locus controls hair colour, with (in males) AY= red-heads, aY = yellow hair. The B locus controls baldness, with BY = bald, bY = full head of hair. Females with genotype AB/ab are crossed to random males. If the A and B loci are far enough apart on the X chromosome to be considered unlinked, what are the expected frequencies of three phenotypes (bald, red hair, yellow hair) in the male offspring of this cross? Imagine we observe 50 percent bald, 42 percent yellow hair, and 8 percent red hair. What is a recombination fraction between the bald and red/yellow loci?
What could be expected phenotypes, and in what number will the y be expected? Suppose no linkage.
The following Punnett square shows the inheritance of the sickle cell and SRY genes, with X representing the X chromosome with no SRY gene and Y representative the Y chromosome which does have an SRY gene. Complete the Punnett square.
Suppose that P is always completely dominant to any number of p's, and that the locus is close to the centromere. What is an expected ratio of purple:white in the progeny of the next crosses.
Why can there be dissimilarity between heart rate averaged over 15 seconds and instantaneous heart rates. Suppose that green turtle grass ingestion time for the sea urchins has an approximate normal distribution.
What are genotypes of the adult that were crossed. 0 percent of a population died from sunburn, of the 10 percent who died 10 individuals were albino and the rest were split evenly between heterozygous (Gg) and dominant individuals (GG). So my questi..
Which of the follow statements regarding cancer risk factors is false. Mutagens are generally not carcinogens.
Where does the label show in mevalonate. A spherical ball of solid, nonporous naphthalene (as in a "moth ball") is suspended in still air; naphthalene ball slowly sublimes, releasing the naphthalene into the surrounding air by molecular diffusion lim..
He was puzzled, combative, and he refuses to drink any water or any liquid. He lived on Oct. 7th, 1849. While said to the man's name, the student thought "Nevermore!" What was his diagnosis.
Based on the structure of individual keratin subunits, why would a single point mutation in the alpha-helical region of the monomer result in a defect in the polymer.
As Ben jumped on his bike and headed for the fresh water lake, his mom called after him, "Don't swim if we have an electrical storm-it looks threatening". That was a valid request. Why with reason.
Understand the section on spermatogenesis. Do you think the age of the man is as important in determining the chance of chromosomal abnormalities? Why or why not give reasons.
Those that live in tropical climates like the savannas of Africa are usually much smaller than the ones that live in arctic regions like Lapland.
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