A. crossing over results in the exchange of genetic material of homologous chromosomes.

b. fertilization produces offspring with varied genetic combinations.

c, chromosomes are randomly assorted into gametes.

d. at the completion of meiosis, all four gametes differ.

e. no two offspring can ever be identical.

meiosis produces gametes during sexual reproduction. as seen here, meiosis results in four haploid gametes. review the process as well as the results of meiosis, paying particular attention to the green circled area. what statements, in the prompt, accurately describes what is modeled here?

a) a - e

b) a - d

c) a - c

d) a and b

i'm pretty sure it's spores

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.