Crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of homologous chromosomes.
What is crossing over?
- Crossing over is the exchange and recombination of genetic components between the homologous chromosomes.
- This occurs in the pachytene stage of the meiosis-1 of the meiotic division.
- Crossing over occurs with the help of an enzyme and the enzyme responsible for crossing over is called Recombinase.
Thus, crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of the homologous chromosomes.
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Explanation:
organisms like amoeba, yeast, hydra and planaria, etc.
organism like hydra uses the method of budding for asexual reproduction , amoeba uses binary fission for a serial reproduction , planar uses regeneration and in the same way , plasmodium uses multiple fission
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Salt water fish are perfectly adapted to their salty environment and need osmosis to live. The replacement fluid taken on to replace the lost water is desalinated by a process known as diffusion. Diffusion allows fish to live in a state of constant osmosis
A hypothesis is uneducated guess guess, or A guess you make before not knowing anything about the topic. The theory is A educated guess . Siri you would already know information about the topic and then putting your input
