Suppose that you have discovered a new mutant in Drosophila melanogaster. What kinds of genetic crosses should you do to determine if the allele causing the mutation is inherited as an autosomal dominant trait, an autosomal recessive trait, or a sex-linked trait?
What will be an ideal response?
You should do at least the following crosses:male
with the mutant phenotype X female with the mutant phenotype
male with the mutant phenotype X female without the mutant phenotype
male without the mutant phenotype X female with the mutant phenotype
After examining the offspring of these crosses, you may need to do even more crosses to determine the
inheritance pattern. Crosses within some of the offspring sets may be very useful in such cases.
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Based on the fossil record, ____ evolved about 1.8 million years ago and made fairly sophisticated tools, including the
hand axe.
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
How many different alleles for ABO blood types in the total human population exist?
a. two b. three c. four d. six e. nine
What molecule is essentially a waste product of photosynthesis?
A) carbon dioxide B) light C) carbohydrates (sugars) D) oxygen
The presence of (hyphae/spores/spherules) in a sample from the lungs is diagnostic for coccidioidomycosis.
Fill in the blank(s) with the appropriate word(s).