In humans, normal skin pigmentation is influenced by a dominant gene (C) which allows pigmentation
to develop. All individuals who are homozygous for the recessive allele (c) are unable to produce an
enzyme needed for melanin formation and are therefore referred to as albino. Two normal parents
produce an albino child. What are the chances that the next child will be an albino? What will be an ideal response?
1/4 chance
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In relation to functional groups, what is an R-group?
a. An R-group is an abbreviation that denotes the addition of a phosphate to any functional group. b. An R-group is an abbreviation used to show any group to which the functional group is attached, usually at a carbon or hydrogen atom. c. An R-group indicates that the functional group was formed through dehydration synthesis. d. An R-group is an abbreviation for an acetyl group in inorganic chemistry.
A bacterial mismatch repair system is able to correct replication errors that insert an incorrect nucleotide. How is this repair system able to determine which mismatched base is incorrect?
A) The incorrect base results in a bulge on only the new strand. B) The incorrect base is in the parental strand which is modified with methyl groups. C) Some bases of the parental strand are methylated, while none of the new strand are. D) A methyl group is attached to the incorrect base in the newly synthesized DNA strand. E) DNA polymerase is bound to the new strand at the location of the incorrect base.
Biodiversity refers to _____
a. genetic diversity b. species diversity c. ecosystem diversity d. all of these
Which genetic diseases involve defects in DNA repair that affect cell division?
a. Gaucher disease and Werner syndrome b. Kearns-Sayre syndrome and progeria c. progeria and Gaucher disease d. Gaucher disease and cystic fibrosis e. progeria and Werner syndrome