One of the key reasons why older mothers tend to give birth to babies with trisomies is:
A: Delayed stabilization of cohesins during meiosis.
B: Premature degradation of cyclins during meiosis.
C: Premature degradation of cohesins during meiosis.
D: Premature resolvement of chiasmata during meiosis.
A: Delayed stabilization of cohesins during meiosis.
B: Premature degradation of cyclins during meiosis.
C: Premature degradation of cohesins during meiosis.
D: Premature resolvement of chiasmata during meiosis.
举一反三
- 中国大学MOOC: One of the key reasons why older mothers tend to give birth to babies with trisomies is:
- The eggs discharged from the ovaries are at:() A: First meiosis metaphase B: Second meiosis prophase C: First meiosis prophase D: Second meiosis metaphase E: Second meiosis anaphase
- Complete compensatory pause could be seen in A: atrial premature beats. B: ventricular premature beats. C: junctional premature beats. D: bigeminy of ventricular premature contraction. E: sinus premature beats.
- Which of the following about cell cycle is NOT true？（ ） A: We can get the synchronization of the cells by blocking DNA synthesis by TdR. B: Cytokinesis of animal cells is mediated by a contractile ring of actin and myosin II filaments. C: Meiosis II is similar to meiosis I. D: According to the characteristics of cell division, cell groups can be divided into three types, such as Cycling cells, Terminally Differentiated cells and Quiescent cell.
- Please give special attention the packing so as to avoid damage . A: for, in the transit B: with, during transit C: to, during transit D: for, in transit