If two parents that are heterozygous (aa) at a single locus give rise to offspring that are 25 percent aa, 50 percent aa, and 25 percent aa, then all of the following are true except:
(a) the parents are diploid organisms.
(b) the a allele is recessive lethal.
(c) the alleles assort independently.
(d) the gametes combine at random.
(e) the probability that a given gamete will receive allele a is one-hal

How is the carbon cycle related to global warming ?

Step 1 review the imaginary strand of dna below. note the complementary base pairs. a g c a a t c c g t c t t g g t c g t t a g g c a g a a c c step 2 to begin replicating this strand of dna, draw the two sides of the strand separating. step 3 now, draw the free-floating bases linking up with the separate sides. remember to follow the rules of complementary base pairing. step 4 draw the two resulting dna strands.

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.