For each of the following sentences, choose one of the options enclosed in square brackets to make a correct statement
Starting with a single diploid cell, mitosis produces [two/four] [identical/different] [haploid/diploid] cells, whereas meiosis yields [two/four] [identical/different] [haploid/diploid] cells. This is accomplished in meiosis because a single round of chromosome [replication/segregation] is followed by two sequential rounds of [replication/segregation]. Mitosis is more like meiosis [I/II] than meiosis [I/II]. In meiosis I, the kinetochores on sister chromatids behave [independently/coordinately] and thus attach to microtubules from the [same/opposite] spindle. The cohesin-mediated glue between [chromatids/homologs] is regulated differently near the centromeres than along the chromosome arms. Cohesion is lost first at the [centromeres/arms] to allow segregation of [chromatids/homologs] and is lost later at the [centromeres/arms] to trigger segregation of [chromatids/homologs].
Starting with a single diploid cell, mitosis produces two identical diploid cells, whereas meiosis yields four different haploid cells. This is accomplished in meiosis because a single round of chromosome replicationis followed by two sequential rounds of segregation. Mitosis ismorelike meiosis II than meiosis I. In meiosis I, the kinetochores on sister chromatids behave coordinately and thus attach to microtubules from the same spindle. The cohesin-mediated glue between chromatids is regulated differently near the centromeres than along the chromosome arms. Cohesion is lost first at the arms to allow segregation of homologs and is lost later at the centromeresto trigger segregation of chromatids.
You might also like to view...
The ________ was proposed to help explain speciation that appears in the fossil record.
A. phylogenetic species concept B. morphological species concept C. genetic divergence species concept D. evolutionary species concept
Which of the following recurs at the initial site of infection?
A) gonorrhea B) syphilis C) genital herpes D) chancroid E) LGV
What can you conclude from these results?
You are breeding different varieties of roses in your garden. When you cross a true-breeding yellow "Texas Beauty" rose with a true-breeding "Ruby" red rose, you get all red roses. But when you cross a "Texas Beauty" yellow with the yellow variety "Jealousy," you get a 9:7 ratio of red to yellow flowers! A. The environment, and not genes, influences pigment in these rose varieties. B. There are epistatic interactions between at least two genes for rose pigment. C. The red allele is dominant to the yellow allele. D. There is a mutation in the gene for yellow pigment in the "Jealosy" variety. E. There is no recessive allele for the red pigment gene.
Where do the molecules used as the inputs of the Calvin cycles (ATP and NADPH) come from?
A) They come from the sun. B) They come from the light reactions. C) They come from the air. D) They come from previous Calvin cycles.