Reference no: EM133416423
Questions
1. Prokaryotic cells reproduce by binary fission and this process does not include:
genes are on a circular DNA molecule
the single chromosome copies separate
the plasma membrane grows inward
two uniquely different cells result
2. You look under a microscope and see that the chromosomes in a cell are aligned single file along the center of the cell. You can probably assume that the cell is in the metaphase stage in division.
True
False
3. Cancer cells divide more frequently than non cancerous cells which explains why radiation and chemotherapy are effective cancer cell treatments.
True
False
4. Most animal cells must be in contact with a solid surface to undergo cell division (mitosis) and then they stop dividing when they grow into or touch another cell.
True
False
5. Karyotypes provide a photographic view of a cell's chromosomes.
True
False
6. Sister chromatids separate during meiosis II which results in cells with half the number of chromosomes as the parent cell.
True
False
7. You are looking at a cell under a microscope and see the nuclear membrane disappear and the chromosomes are becoming visible. You are probably looking at a cell in the stage of prometaphase.
True
False
8. The following are all recessive sex linked traits in humans: red-green color blindness, muscular dystrophy and hemophilia.
True
False
9. Probability begins anew with each fertilized egg. This explains why it is not probable for a couple to have only five male children but it is possible.
True
False
10. Linked genes are located a great distance apart on the same chromosome, but sort together during meiosis.
True
False
11. All human characteristics and traits are caused by the genotype of an individual.
True
False
12. All organisms contain sex chromosomes for male and female.
True
False
13. Dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders because most individuals carrying the lethal dominant gene, die before they reproduce.
True
False