DNA

Unit 2 Biology AQA topic 8: DNA and Meiosis.

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  • Created by: Amelia
  • Created on: 11-05-13 15:33
(Easy first question). What is DNA made up of?
A sugar called deoxyribose, a phosphate group and an organic base.
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Which two bases are single-ring bases?
C and T
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Which two bases are double-ring bases?
A and G
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Adenine always pairs with thymine by means of...
two hydrogen bonds
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Guanine always pairs with cytosine by means of...
three hydrogen bonds
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Mitosis produces...
two daughter nuclei with the same number of chromosomes as the parent cell and as each other.
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Meiosis produces...
four daughter nuclei, each with half the number of chromosomes as the parent cell.
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A section of DNA that codes for a polypeptide is known as a
gene
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The position of a gene on a chromosome or DNA molecule is known as a
locus
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One of the different forms of a particular gene is known as a
allele
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During meiosis 1, each chromosome lines up alongside its homologous partner. When these homologous pairs arrange themselves in this line they do so randomly. One of each pair will pass to each daughter cells. Pairs are lined up at random. Known as...
independent segregation
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When new genetic combinations are produced, the chromatids cross over one another many times and so the process is known as...
crossing over
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After meiosis 1 and genetic recombination by crossing over, the broken-off portions of chromatic recombine with another chromatid. What is this process defined as?
Recombination
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Other cards in this set

Card 2

Front

Which two bases are single-ring bases?

Back

C and T

Card 3

Front

Which two bases are double-ring bases?

Back

Preview of the front of card 3

Card 4

Front

Adenine always pairs with thymine by means of...

Back

Preview of the front of card 4

Card 5

Front

Guanine always pairs with cytosine by means of...

Back

Preview of the front of card 5
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