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Margaret [11]
3 years ago
9

The two homologs of a pair move toward opposite poles of a dividing cell during

Biology
1 answer:
finlep [7]3 years ago
8 0
This happens during meiosis I, in the Anaphase I stage. Meiosis is a type of cell division in sexually reproducing organisms consisting of two rounds of cell division ( meiosis I and meiosis II) but only one round of DNA replication, result in cells with half the number of chromosomes sets as the original cell. In meiosis I homologs pair and segregate away from each other, the cell division in meiosis that separates homologous chromosomes, and after that the cells are haploid. 
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m_a_m_a [10]
Hello There!

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5 0
4 years ago
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

7 0
3 years ago
The DNA structure is similar to a ladder. Choose the molecules that make up the "rails" or sides of the DNA structure.
svp [43]

Answer:

guanine, adenine, cytosine,

Explanation:

4 0
2 years ago
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sesenic [268]

Explanation:

competition for survival

6 0
3 years ago
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The correct answer for the question that is being presented above is this one: "<span>the mammal and the reptile." </span>The additional piece of information will be most helpful to Julia to properly build her phylogenetic tree is that i<span>t is trying to figure out on what tree it belongs to but it has some features of the animals but the 2 main ones: the mammal and the reptile.</span>
3 0
3 years ago
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