Indicate which of the cells undergo mitosis, and which undergo meiosis. (6 points)
Item 16
Item 19 Item 20 Item 21 Item 22 Item 23 Item 24
Meiosis Mitosis
Unicellular organisms Liver cells
Sperm cells Brain Cells Egg cells Skin cells
Mitosis: Liver cells, Brain cells, Skin cells
Meiosis: Sperm cells, Egg cells
Complete the following statement. Refer to the image below.
(1 point)
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome,
occurs.
Crossing over Fertilization Hybridization Mutagenesis
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, crossing over occurs.
Which of the following statements best describes the significance of meiosis in human sexual reproduction? (1 point)
Meiosis causes an increase in genetic variation, because of the crossing over of genetic material between homologous chromosomes.
Meiosis causes a decrease in genetic variation, because of the creation of diploid (2N=46) gametes.
Meiosis causes an increase in genetic variation, because of non-disjunction of homologous chromosomes.
Meiosis causes a decrease in genetic variation, because of polyploid gametes.