TEST YOURSELF - 2
Fill in the blanks :
and
(i) in humans, meiosis takes place in
and
(ii) In flowering plants, meiosis takes place in
(iii) In meiosis, chromosome duplication is followed by
(iv) Meiosis requires
time than mitosis.
(v) Crossing over leads to
Answers
Answer ❤️
I) Meiosis accuse in the primordial germ cells cells specified for se xu al reproduction and separate from the body's normal somatic cells. in preparation for Meiosis a germ cell goes through interphase during which the entire cell including the genetic material contained in the nucleus undergoes replication.
ii) In flowering plants, meiosis occur in megaspore mother cell ( megasporocytes ) within the overuse of ovaries and in microspore mother cell ( megasporocytes ) within the anther of stamen.
iii) In meiosis, DNA replication is folowed by two rounds of cell division to produce for daughter cells each with the half the number of chromosome as the original parent cell. The two meiotic division are known as Meiosis| and meiosis. ||
iv) Compared to Mitosis, which can take place in a matter of minutes, meiosis is a slow process, largely because of the time that the cell spends in prophase l. During prophase l , the pairs of homologous chromosomes come together to form a tetrad or bivalents, which contains four chromatids.
v) Crossing over , or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combination of genes in the gametes that are not found in either parent, contributing to genetic diversity.