Bio 121 Exam

How many genes are present in the human genome?

• tens of thousands

• 23

• A hundred thousand

• 46

what is a locus?

• A type of spore made only by fungi

• the precise DNA sequence of a gene

• the precise location of a gene on a chromosome

• a cell with two chromosome sets

Sexual and asexual reproduction are alike in that_______

• they both involve two parents

• in both cases, every parent transmits all of its genes to its progeny

• they both require meiosis to complete the reproductive cycle

• they can both occur in multicellular organisms

A karyotype is.............

• A list of all the genes a person carries

• the physical trait a person has

• a method of identifying crossover events

• a photograph of all the chromosomes in a single cell from an individual

Fertilization produces

• a haploid zygote

• a diploid zygote

• a diploid zygote, except during the gametophyte stage of alternations of generation

• a diploid and haploid zygote

Which of the following statements is most accurate

• diploid cells can divide by meiosis

• haploid cells cannot divide by meiosis

• haploid cells can divide by mitosis

• all the above

Which of the following is part of the life cycle called alternation of generations?

• Zygote

• Spores

• Spores

• All of the listed responses are correct.

The sexual cycle of the diploid, multicellular algal genus Fucus involves..........

• both mitosis and meiosis but not fertilization

• mitosis, meiosis, and fertilization

• only meiosis and fertilization

• mitosis only

A life cycle in which the only multicellular form is haploid is most typical of.

• prokaryotes

• plants

• fungi

• fish

In sexually reproducing species, the chromosome number remains stable over time because

______and_________

always alternate.

• meiosis; mitosis

• meiosis I; meiosis lI

• mitosis; fertilization

• meiosis; fertilization