Cal State LA » Biology » Biology 1100 - Principles of Biology » Fall 2019

Biology 1100 - Principles of Biology » Fall 2019 » Week 10 Quiz

Need help with your exam preparation?

Question #1

Let Y = yellow and y = green, and R = round and r = wrinkled. You cross YYRR peas with yyrr peas. All of the F1 individuals are yellow and round with a genotype of YyRr. You then perform an F2 cross and get the expected 9:3:3:1 phenotypic ratio. What proportion of the F2 plants are expected to be heterozygous for both traits?

A. 1/2 (one half)

B. 1/16 (one sixteenth)

C. 9/16 (nine sixteenth)

D. 1/4 (one fourth)

Question #2

The physical basis for the segregation of alleles when gametes are formed is ______.

A. separation of homologous chromosomes during anaphase I followed by separation of sister chromatids during anaphase II.

B. separation of sister chromatids during anaphase I followed by separation of homologous chromosomes during anaphase II.

C. crossing over during prophase I.

D. separation of the two strands of DNA during DNA replication.

Question #3

According to Mendel’s Principle of Independent Assortment, _____.

A. the two alleles controlling a given trait remain discrete – they neither blend with nor alter each other.

B. each individual has two alleles controlling a given trait.

C. dominant alleles assort independently of recessive alleles.

D. each pair of alleles segregates independently of the other allele pairs.

Question #4

RFLPs can be used to tell the difference between individual DNA samples because _______.

A. each human's DNA shares long, identical sequences

B. some DNA is more hydrophobic than others

C. centromeres and telomeres contain numerous repeats

D. each person's DNA is slightly different

Question #5

Bacteria can produce restriction enzymes without damaging their own cells because _____.

A. restriction enzymes are very specific

B. restriction enzymes can only cut viral DNA

C. viral and bacterial DNA are structurally distinct

D. restriction enzymes cut RNA

Need help with your exam preparation?

Existing Quiz Clients Login here