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choli [55]
3 years ago
14

An example of what is geese flying south for the

Biology
1 answer:
kozerog [31]3 years ago
7 0

Answer:

migration

Explanation:

birds move one place to another, geese is one of them, usually they migrate is because winter is coming and there isn't so much food,need shelter, surviving and driving to safety. All they want is a good home

♡

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Which enzyme is mixed with a DNA sample before gel electrophoresis
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Answer:

Restriction enzyme

Explanation:

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  • <em><u>The restriction enzyme is mixed with a DNA sample before the process. The restriction enzyme cut DNA at specific points into fragments which can then be separated based on their sizes on an agarose gel.</u></em>
  • When current is applied to the gel DNA move towards the positively charged electrode since DNA is negatively charged, with shorter fragments migrating faster through the gel in comparison with large fragments.
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how does the random alignment of homologous chromosomes contribute to genetic variation in a population
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The assortment of homologous chromosomes during meiosis is random and generates genetic variation, the raw material for evolution.

During metaphase I of meiosis, homologous chromosomes are lined up at the equator plate of the cell in order to be separated (assorted) in anaphase I.

The separation of homologous chromosomes during meiosis I is random. Daughter cells receive unique gene combinations from an original parent cell.

Subsequently, haploid cells got from two successive meiotic divisions fuse during fecundation to form a diploid (2n) zygote.

During prophase I, non-sister chromatids interchange genetic material by a process known as recombination. This genetic process also increases genetic variation in daughter cells.

In conclusion, the assortment of homologous chromosomes during meiosis is random and generates genetic variation.

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