Question

drag the terms to the appropriate blanks to complete the sentences. not all terms will be used.

terms:
d loop
conversion
mutation
identical
homologous
holliday junction

sentences:
gene blank occurs when mismatched bases are repaired in the damaged chromosome in such a way that the sequence of bases has been changed.

when dna from a double-stranded molecule is displaced in sdsa, it is called a blank.

two double-stranded dna molecules that are largely the same, but have some base pair differences between them are considered blank sequences.

Explanation:

Define gene conversion

Gene conversion is a non-reciprocal recombination process. It occurs when mismatched bases are repaired in a heteroduplex DNA region during recombination, resulting in one allele being replaced by another. Thus, "Gene conversion occurs when mismatched bases are repaired in the damaged chromosome in such a way that the sequence of bases has been changed."

Identify the displaced DNA structure

During Synthesis-Dependent Strand Annealing (SDSA), a damaged DNA strand invades a homologous template. This strand invasion displaces one of the strands of the template double helix, forming a characteristic bubble-like single-stranded structure known as a displacement loop, or D-loop.

Classify nearly identical sequences

Two double-stranded DNA molecules that share high sequence similarity but contain minor base-pair differences (such as alleles on maternal and paternal chromosomes) are referred to as homologous sequences.

Answer:

Question 1

Gene <blank>conversion</blank> occurs when mismatched bases are repaired in the damaged chromosome in such a way that the sequence of bases has been changed.

Question 2

When DNA from a double-stranded molecule is displaced in SDSA, it is called a <blank>D loop</blank>.

Question 3

Two double-stranded DNA molecules that are largely the same, but have some base pair differences between them are considered <blank>homologous</blank> sequences.