Stem and root thickening in eudicots is
accomplished by ___ and is called ___ growth.
a. lateral meristems--primary
b. lateral meristems--secondary
c. apical meristems--primary
d. apical meristems--secondary
e. apical meristems--lateral
B
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The H substance is needed for the proper phenotypic expression of the A, B, and AB blood types in the ABO blood typing system in humans. Individuals who are recessive for the H substance (hh) will have a type O phenotype, even if they have the A and/or B alleles. Two individuals, each with type AB blood and heterozygous at the H locus have children. What is the probability they will have a child who is phenotypically type O?
A. No chance B. 100% C. 3/16 D. 4/16 E. 6/16
Graph B shows that breeding bird species
richness a. is greater than 1,000 at the equator. b. drops off in northern and southern latitudes. c. is less than that of ants at 30 degrees north latitude. d. drops by more than an order of magnitude at 40 degrees north latitude. e. includes all of these.
If a diploid organism has a genome consisting of 4
pairs of chromosomes, it can produce __________ different combinations of maternal and paternal chromosomes (disregarding crossing over). a. 4 b. 8 c. 12 d. 16 e 32
DNA encoding a normal gene is inserted into cells from a patient with a defective form of the gene. Recombinant cells are identified and isolated, and returned to the patient's body. This is an example of
A) gene therapy. B) genomics. C) genetic mapping. D) genotyping. E) biotechnology.