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pogonyaev
3 years ago
10

A new compound forms permanent crosslinks between the two strands of DNA in a chromosome. How can it function in chemotherapy ag

ainst cancer? A. It would block DNA replication B. it would block spindle formation C. it would prevent chromosome condensation
Biology
1 answer:
kari74 [83]3 years ago
8 0

Answer:

A. It would block DNA replication

Explanation:

The first step in DNA replication is the break of the DNA double helix. The break allows the DNA polymerase to bind to the single DNA strand  and perform the synthesis of the complementary strand. Errors may occur in the process of DNA replication that affect the organism.

B) it IS NOT true because the formation of the spindle is a different independent process, and occurs in the presence of chromosomes with crosslinked strands.

C) it IS NOT true because condensation of the chromosomes occurs when teir DNA strands are crosslinked.

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In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds), while aa plants have yellow ke
lara31 [8.8K]

Answer:

<h2>A) Yes, 12 mu</h2><h2>B) AaWw</h2><h2>C) 0.25%</h2><h2 />

Explanation:

As given,

Allele A for  blue anthocynin.

aa for yellow kernel;

at  second locus;

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ww for wrinkled kernel;

Parents as given are:  AaWw and aaww

Progeny are:

blue smooth ( AaWw)= 1447;

blue wrinkle (Aaww)= 169;

yellow smooth (aaWw)= 186;

yellow wirnked (aaww)= 1510

a)

Recombinant progeny are  169+ 186= 355

non- recombinant progeny are = 1447+ 1510= 2957

so recombination frequency (RF)= 346/2957×100= 12.0054%

So a and w are linked genes.

They are 12 mu far away from each other.

b) Blue smooth parent= AaWw.

c) Aaww crossed with  aaWw

progeny are= AaWw, Aaww, aaWw, aaww,

They all are produced in same proportion =0.25% or 1/4.

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