Describe the approach using genomics to identify genes that contribute to the variations in cognitive ability observed
in humans.What will be an ideal response?
ANSWER: This approach uses SNPs and other DNA markers to identify chromosome regions that
contain genes related to specific traits. Identifying the number of these regions associated
with variation in a specific phenotype is an indirect way of determining whether that
phenotype is controlled by many genes, each having a small effect, or by a small number of
genes, each with a major effect on the phenotype. One study has provided strong evidence
that a large proportion of individual differences in intelligence is due to genetic variation, and
that many genes, each with a small additive effect, are involved in these differences
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A shift from expected allele frequencies, resulting from chance, is known as
(a) natural selection. (b) genetic drift. (c) mutation. (d) gene flow.
Identify the structure of the neuron marked D
a. axon terminal b. cell body c. axon d. glial cell e. dendrites
Using biotechnology, plant breeders attempt to find and incorporate specific resistance genes into plants that lack them. Once a plant has been given a resistance gene, it will have indefinite protection from the associated pathogen.
Answer the following statement true (T) or false (F)
Which of the following pairs of terms is mismatched?
A) bacteriostatic — kills vegetative bacterial cells B) germicide — kills microbes C) virucide — inactivates viruses D) sterilant — destroys all living microorganisms E) fungicide — kills yeasts and molds