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levacccp [35]
3 years ago
10

While human cells have a number of mechanisms to repair damaged DNA, these mechanisms are not perfect. Describe two conditions o

r diseases related to faulty or absent DNA repair.
Biology
1 answer:
amm18123 years ago
7 0

Answer:

1). Xeroderma pigmentation.

2). Ataxia-telangiectasia.

Explanation:

DNA repair processes include all the processes, which help in identification and correction of errors or damages in DNA. Defects in DNA repair mechanisms that increase risks for developing cancers and various other disorders. Two conditions related to faulty DNA repair are:

1). Xeroderma pigmentation (XP): XP can be defined as a genetic disorder, due to mutations in genes involved in repair processes. It leads to severe sunburn and freckling due to sun exposure, dry skin and skin pigmentation. People having xeroderma pigmentation are prone for skin cancer.

2). Ataxia-telangiectasia (AT): AT is caused bu mutation in ATM gene (ataxia-telangiectasia mutated) gene, which in involved in nucleotide-excision repair pathway. It leads to severe disability in children and increases risk for developing lymphomas and leukemia.

 

 

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Answer:

3

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In pea plants, two stem lengths are possible: tall (T) and dwarf (t). Tall is dominant to dwarf. a. In a purebred tall plant, wh
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Answer:

a. only T gametes

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b. A purebred dwarf plant (tt) will produce only 't' gametes.

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5 0
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Which sequence best represents increasing
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Which genes were expressed in the lung cancer cells?
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P53, EGFR and KRAS genes

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Mutations on somatic cells will disturbs the cell cycle and induce cell proliferation which lately results in tumour formation. The mutated P53, EGFR and KRAS genes causes lung cancer. P53 has direct contact with DNA acts a suppressor of tumour and guards the cell divisions. When these genes are mutated they induce expression of different genes (especially P53) leading to lung cancer.

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