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denis-greek [22]
4 years ago
10

At the end of meiosis, if a cell has too many chromosomes and a cell has too

Biology
1 answer:
jekas [21]4 years ago
3 0

Answer:Aneuploidy: Extra or missing chromosomes. Changes in a cell's genetic material are called mutations. In one form of mutation, cells may end up with an extra or missing chromosome.

Explanation:

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3 years ago
The lactose (lac) operon in E. coli is an example of a repressed gene when lactose is not available in a cell. In 3-5 sentences
irakobra [83]

Answer:

Please find the detailed explanation of this statement below

Explanation:

Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.

However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.

Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.

4 0
4 years ago
How much is a quarter
Anni [7]

50$ or 60$ depending on who you get it from

6 0
3 years ago
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New Mexico has several natural resources that it uses for energy. An example of a NONRENEWABLE energy source is
Rudiy27

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Oil, coal, and uranium.

Explanation:

When we talk about renewable sources, we refers to a natural resource  or source of energy. The non- renewable sources means that exists in finite amount, and are not easily replenish.

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3 years ago
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