Which among the following statements about tetrad is true?
1) Two chromosome
2) Four chromatid
3) Two kinetochore
4) Four centromere
5) Formed in zygotene and clearly appears in pachytene
6) Formed by the formation of synaptonemal complex
A. All are correct
B. 1,2,5,6 are correct
C. 1,2,3,5 are correct
D. 1,2,3,4,5 are correct
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Ответ:
During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.
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Explanation: