Which of the followings would contain genetic material that is 100% identical?
A: Homologous chromosomes
B: Sister chromatids
C: X and Y chromosomes
D: Acrocentric chromosomes
E: non-sister chromatids
A: Homologous chromosomes
B: Sister chromatids
C: X and Y chromosomes
D: Acrocentric chromosomes
E: non-sister chromatids
举一反三
- Telophase begins when( ). A: chromatids line up in the middle of the cell B: the nuclear envelope breaks down C: chromatin condenses D: daughter chromosomes arrive at opposite poles of the cell E: centrioles reach opposite poles of the cell
- Which of the following does not lead to the formation of aneuploid gametes? A: Failure of homologous pairs to separate at anaphase B: A mutatation in a single gene located on chromosome 2. C: A pair of sex chromosomes that does not separate during anaphase D: A set of sister chromotids that doest not separate during anaphase I
- Which of the following descriptions about anaphase is CORRECT?() A: The<br/>kinetochore microtubules are shortened by de-polymerization B: Microtubules<br/>attach to kinetochore of chromosomes C: The<br/>separated chromatids move to opposite spindle poles D: The<br/>shape of cell is stretched during the latter part of anaphase
- If human chromosomes are stained on a slide, the resulting display, which is called a ______
- C. elegans has 12 chromosomes that contain a total of ______ genes. A: 4,494 B: 6,340 C: 23,000 D: 27,000