A number of plant species have a recessive allele for
albinism; homozygous albino (white) individuals are unable
to synthesize chlorophyll. If a tobacco plant heterozygous
for albinism is allowed to self-pollinate and 500 seeds
germinate: a)how many offspring will be the same genotype
as the parent? b)how many seedlings would you expect to be
white?
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what are the genetical reasons behind obesity?
The ABO blood system has been employed to settle cases of disputed paternity. Suppose, as an expert in genetics, you are called to testify in a case where the mother is type A, the child is type O and the alleged father is type B. How would you respond to the following statements of the attornies: a. "Since the mother has type A, the type O of the child must have come from the father and since my client is type B, he obviously could not have fatered the child." Made by the attorney of the alleged father. b. "Further tests revealed that this man is heterozygous and therefore he must be the father." Made by the mother's attorney.
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which chemical substance is generally used to obtain polyploids?
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what is virgin sex?
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The gene for tallness (T) is dominant over the gene for shortness (t) in pea plants. A homozygous dominant pea plant is crossed with a heterozygous pea plant, and 200 seeds are produced. Approximately how many of these seeds can be expected to produce plants that are homozygous dominant?
In human beings, brown eyes are usually dominant over blue eyes. Suppose a blue-eyed man marries a brown-eyed woman whose father was blue-eyed. What proportion of their children would you predict to have blue eyes?
Why do we age?