A cow with black and white patches is produced from a white bull and a black cow. This is an example of

a. incomplete dominance.
b. Codominance.
c. dominance/recessive trait.
d. Pleiotropy.


Ans: b. Codominance.

Biology & Microbiology

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Suppose an individual is heterozygous for alternate alleles of gene A (Aa). Under what conditions would a crossover in a somatic cell of this individual lead to a clone of cells that are homozygous for a? (Pick the most precise answer.)

A) The crossover would have to occur between the A locus and the centromere and involve two homologous (nonsister) chromatids. B) The crossover would have to occur between the A locus and the end of the chromosome and involve two homologous (nonsister) chromatids. C) The crossover would have to occur between the A locus and the end of the chromosome and involve two nonhomologous chromosomes. D) The crossover would have to occur between the A locus and the centromere and involve two sister chromatids.

Biology & Microbiology

____ changes the DNA but has no impact upon

the individual

a. A beneficial mutation b. A lethal mutation c. A random mutation d. A neutral mutation e. None of these

Biology & Microbiology

In sweet peas, genes C and P are necessary for

colored flowers. In the absence of either (__ pp or cc __) or both (cc pp), the flowers are white. Give the probable genotype of a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers. What will be an ideal response?

Biology & Microbiology

Which is NOT an indigenous microbe used for bioremediation?

A) Piscirikettsis salmonis B) Pseudomonas aeruginosa C) Phanerochaete sordida D) E. coli E) Deinococcus radiodurans

Biology & Microbiology