A certain type of congenital deafness in humans is caused by a rare autosomal recessive gene. In a mating involving a deaf man and a deaf woman, could some of the children have normal hearing? Explain your answer
What will be an ideal response?
Because the gene in question is recessive, both of the parents are homozygous and one would not expect normal hearing in the offspring.
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Where are nematocysts located on a cnidarian's body?
a. on lid cells b. in a cnidocyte c. on the base of polyps d. around the ectodermal outside of the body e. on mesoderm cells
__________ results from a mutation to a gene on the X chromosome that will eventually lead
to muscle fibers to break down.
Fill in the blank(s) with the appropriate word(s).Which type of organisms were likely the first land animals?
a. birds b. reptiles c. mammals d. amphibians e. arthropods
In vertebrates, the family of myogenic regulatory factors (MRFs) plays a major role in muscle development. This family consists of four related genes that have distinct but overlapping functions. This gene family is represented by only a single gene in Drosophila, called nautilus. You want to know whether nautilus plays a role like all of the MRFs put together, or more like one in particular. What is a quick and easy way to begin to address this question?
A. Use a DNA microarray to compare gene activation patterns between nautilus and the MRFs. B. Compare the proteome of a cell expressing nautilus to the those of cells expressing each of the MRFs in turn. C. Generate four transgenic Drosophila strains that express the MRFs in a mutant nautilus background. D. Compare the DNA and protein sequences of all the genes to determine if nautilus is more similar to one MRF than another.