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const2013 [10]
2 years ago
8

Eukaryotic telomeres replicate differently than the rest of the chromosome. This is a consequence of which of the following?DNA

polymerase that cannot replicate the leading strand template to its 5' endgaps left at the 5' end of the lagging strandgaps left at the 3' end of the lagging strandthe "no ends" of a circular chromosome
Biology
1 answer:
andrezito [222]2 years ago
3 0

The correct answer is: gaps left at the 5' end of the lagging strand

Telomeres are repetitive regions at the very ends of chromosomes found in eukaryotic organisms. The “problem” with telomeres is that the DNA  replication cannot be fully finished in each round which result in a slow, gradual shortening of the chromosome.  

Gaps at the end of lagging strand are formed because lagging strand is synthesized via Okazaki fragments (small DNA fragments). So, when replication fork during replication reaches the end of the chromosome, a short stretch of DNA does not get covered by an Okazaki fragment and consequently remains uncopied in each round of replication, leaving a single-stranded overhang.

Telomerase is an enzyme that solves this problem by extending the telomeres of chromosomes.

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The correct genotypic notation for a wild type with phenotypic characteristics: red eyes, long bristle and round eyes will be any of CNRDll, CnRdl, CnRDl or CNRdl if c, n, r and d are capable of independent assortment and CNRDl if they cannot.

Explanation:

The eye color and bristle size is coordinated by either recessive cn and dominant CN or Cn genes. The wild type in questions has red color eyes, which is a dominant trait coordinated by CN or Cn if c and n can undergo assortment independently or just CN if they cannot. The second characteristics of the wild type is long bristle. We were told that reduced bristle is coordinated by recessive rd Gene. Then the long bristle in our specimen wild type will have dominant genotypic notification of RD or Rd, depending if r and d can undergo assortment independently. The last trait is a round eyes, which is a recessive trait controlled by recessive allele l. Therefore, the combined characteristics of red eye color, long bristle and round eyes shape of the wild type will be CNRDl or any of CNRDll, CnRdl, CnRDl CNRdl depending on the segregation pattern of c, n, r and d.

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