1) Four Helixes in a double chromosome [ 2 for each strand ]
2) Centromere is t<span>he region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.
3) </span><span>A </span>homologous pair<span> is a </span>pair<span> of chromosomes containing a maternal and paternal chromatid joined to together at the centromere
4) End result = 12 pair of chromosome which is unindentical to each other.
5) Crossing over is </span><span>the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.
Crossing over occurs during prophase I in nucleus of the cell [ as it is operation of chromosomes ]
</span>Crossing over<span> creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity. So, it is so important for Genetic diversity
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Hope this helps!
The answer is a psychiatrist.
Reproduce.
To make more organisms. To make more, is giving us more and more people to be alive, more and more people for the human race to survive.
Hope this helps~!
~{Dunsforhands}
A princess from England who won the world best track star :)
