Web Quiz 2

Web Quiz 2 - Web Quiz 2 1 A red-eyed male Drosophila is...

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Web Quiz 2 1.) A red-eyed male Drosophila is crossed with a white-eyed female (see figure below). Remembering that this gene for eye color is on the X chromosome, and ignoring the slightly lethal effect of the white-eyed allele, what eye color and sex will the offspring have? A. all red-eyed flies B. all white-eyed flies C. all white-eyed males, all red-eyed females D. all white-eyed females, all red-eyed males E. Equal red-eyed and white-eyed flies of both sexes 2.)Sex is determined in different ways in different species (the figure shows an example of the system used by Dro- sophila melanogaster). Which of the following statements about sex determination in animals is false? A. Reciprocal crosses involving sex-linked genes do not give identical results. B. Sex determination mechanisms always involve a pair of sex chromosomes. C. Female birds are hemizygous for genes on the sex chromosomes. D. Some species, such as honeybees, determine sex by the number of autosomal sets present. E. In both fruitflies and humans, males are XY and females are XX. 3.)Which one of the following choices describes a condition which would most likely violate the Mendelian Prin- ciple of Independent Assortment? A. There are more than two types of alleles for a gene present in the population. B. The phenotypic expression of one gene is influenced by the phenotype shown by another gene. C. Two genes occur next to each other on the same chromosome.
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Web Quiz 2 - Web Quiz 2 1 A red-eyed male Drosophila is...

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