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horrorfan [7]
2 years ago
14

Melissa's child was born with an extra chromosome, resulting in down syndrome. this is an example of:_______

Biology
1 answer:
DochEvi [55]2 years ago
6 0

Answer:Mutation

Explanation:

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What 3 reasons why a cell would undergo mitosis
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1. to restore dying cells 2. to repair damaged cells 3. to reproduce
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Animal waste decay by the action of bacteria which create _____________and __________ products rich in nitrogen, and useful for
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Ammonia and nitrate

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During which period did mammals first appear? A. Pleistocene B. Carboniferous C. Cretaceous D. Jurassic
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A mistake in DNA replication, in which the wrong base is placed in the growing DNA strand, can have profound effects on the desc
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DNA replication is the process in which the DNA is copied and it occurs during synthesis phase of the eukaryotic cell cycle. It begins with an enzyme breaking the bonds between complementary bases in DNA which exposes the bases inside  the molecules so they can be read by another enzyme and used to build two new DNA strands with complementary bases.

Explanation:

The original strand is: TAGCGTT

                                      ATCGCAA

The Mutated strand is: TGGCGTT

                                       ATCGCAA

<em>The replicated strand is: GAATCAC</em>

<em>                                           CTTAGTG</em>

5 0
3 years ago
Semi-conservative replication refers to A. each base bonding at the 1' position of the sugar. B. a purine always bonding to a py
rusak2 [61]

Answer:

D) An original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule.

Explanation:

  • Semi-conservative replication  refers to two strands of DNA unzip, and a new strand is assembled onto each 'conserved' strand.
  • The replicated double helix consists of one old strand and one newly synthesised strand.
  • It describes the structure of DNA, a twisted helix of two strands with bases joining the strands.

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3 years ago
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