In the Hardy-Weinberg equation "2pq" represents
a. the homozygous recessive genotypes.
b. the heterozygous genotypes.
c. the homozygous dominant genotypes.
d. the total pool of alleles for the dominant phenotypes.
e. the heterozygous phenotypes
B
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Name two examples of lateral gene transfer to eukaryotes that involve cellular organelles
A) Transfer of bacterial genes that were predecessors to mitochondria and chloroplasts. B) Transfer of the bacterial mitochondrial apparatus to form nuclei and ribosomes. C) Transfer of bacterial chloroplasts to form nuclei and ribosomes. D) Transfer of bacterial genes to form nuclei and the mitotic spindle apparatus. E) Transfer of the bacterial spindle apparatus to form ribosomes and transfer RNAs.
Which of the following occurs during prophase?
A) Chromosomes line up on the midline of the cell.
B) The nuclear envelope forms.
C) Sister chromatids separate.
D) The mitotic spindle begins to form.
Why can scratching or chipping the seed coat speed up the germination of hard-coated seeds like alfalfa?
A. The mechanical stress activates hydrolytic enzymes. B. Water and oxygen can enter the seed to reach the embryo more quickly. C. Carbon dioxide can enter the seed and stimulate photosynthesis. D. Bacteria or fungi can enter the seed and release growth factors. E. Damage to the seed coat triggers the aleurone layer to release amylase.
If stereocilia move toward the kinocilium, which of the following occurs?
A. The otoliths in the utricle return to their resting position. B. Nerve impulses increase in the vestibular nerve. C. The data is sent to the medulla oblongata for processing. D. Fluid within the semicircular canal flows over and displaces the cupula. E. The cupula begins to move in the same direction.