Which of the following statements is INCORRECT about triploid species?
A) Triploid species have an extra copy of one chromosome.
B) Triploid species have three complete sets of chromosomes.
C) Triploid species are usually infertile.
D) Triploid species are an example of a polyploidy organism.
E) All of these choices are correct.
A
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The animal group with the highest biodiversity in the Great Barrier Reef is __________
a. birds b. coral c. fish d. mollusks
In cats the allele B produces black, whereas b
produces yellow. Neither gene is dominant, and in the heterozygous state the phenotype is a combination of yellow and black spots called tortoiseshell. The alleles B and b are X-linked. If a tortoiseshell cat has three tortoiseshell kittens and two black kittens, give the genotype and phenotype of the tomcat that produced them, and give the sex of the kittens. What will be an ideal response?
Albinism is a recessive trait controlled by a single gene. If the frequency of albinos in a population is
0.25, what is the expected frequency of heterozygotes for this trait? (Hint: use the Hardy-Weinberg formula) A. 0.25 B. 0.50 C. 0.75 D. 0.90 E. It is not possible to determine with the information provided.
An antibiotic is given repeatedly to treat a recurrent ear infection. It worked initially but now is no longer effective. This indicates that the Streptococcus bacterium
A) is very sensitive to the antibiotic. B) is being treated with an antibiotic that has experienced a manufacturing error, making it infective. C) is infectious only if it is sensitive to the antibiotic. D) experienced natural selection that has allowed the resistant Streptococcus to survive and multiply.