What type of genetic cross involves two traits?
What will be an ideal response?
dihybrid cross
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Color blindness is an X-linked recessive gene. Two normal-vision parents produce a color-blind child
(a) Is this child male or female? (b) What are the genotypes of the parents? (c) What are the chances that their next child will be a color-blind daughter? What will be an ideal response?
Immigration and __________ permanently affect population size, but __________ does not. Fill in the blank(s) with the appropriate word(s)
Refer to Table 8.2 The anticodon for valine is
A) GUU. B) CUU. C) CTT. D) CAA. E) GTA.
In mammals, individuals with two X chromosomes are female, and individuals with an X and a Y chromosome are male
It had long been known that a gene located on the Y chromosome was sufficient to induce the gonads to form testes, which is the main male-determining factor in development, and researchers sought the product of this gene, the so-called testes-determining factor (TDF). For several years, the TDF was incorrectly thought to be a zinc finger protein encoded by a gene called BoY. Which of the following observations would most strongly suggest that BoY might not be the TDF? Explain your answer. (a) Some XY individuals that develop into females have mutations in a different gene, SRY, but are normal at BoY. (b) BoY is not expressed in the adult male testes. (c) Expression of BoY in adult females does not masculinize them. (d) A few of the genes that are known to be expressed only in the testes have binding sites for the BoY protein in their upstream regulatory sequences, but most do not.