Assume that the genes for tan body and bare wings are 15 map units apart on chromosome II in Drosophila

Assume also that a tan-bodied, bare-winged female was mated to a wild-type male and that the resulting F1 phenotypically wild-type females were mated to tan-bodied, bare-winged males. Of 1000 offspring, what would be the expected phenotypes, and in what numbers would they be expected?


wild type = 425; tan-bare = 425; tan = 75; bare = 75

Biology & Microbiology

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Binary fission is:

A. cell division by meiosis B. cell division by mitosis C. cell division by simple splitting D. fluorescent in situ hybridization (FISH) E. exchange of genes between two cells

Biology & Microbiology

The difference between somatic cell gene therapy and germline therapy is that

A. germline therapy is the temporary repair of a genetic mutation, whereas somatic cell therapy is a permanent fix. B. germline therapy overcomes a protein malfunction in specific tissues but is not repaired in the entire organism and cannot be passed on to offspring. C. somatic cell gene therapy is introduced into the egg, sperm or developing embryo, whereas germline therapy introduces a new gene into a mature tissue. D. somatic cell gene therapy overcomes a protein malfunction in specific tissues but is not repaired in the entire organism and cannot be passed on to offspring.

Biology & Microbiology

Which of the following is NOT true about the

hormone, HCG?

a. it is secreted by the amnion b. it encourages menstruation c. it causes the degeneration of the corpus luteum d. it can be detected beginning the third day e. all of these are not true about the hormone,

Biology & Microbiology

Transport of materials through an epithelial cell is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology