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Chapter 20: Problem 6

What are recombinant chromosomes? How do they differ from the original parental chromosomes from which they are derived?

Short Answer

Expert verified
Recombinant chromosomes come from the process of genetic recombination during sexual reproduction, forming chromosomes with a unique set of genes, different from the parents. Parental chromosomes, on the other hand, match each other with the same genes in order, but with potentially different alleles. In essence, recombinant chromosomes differ from parental chromosomes by showing a unique combination of genes from both parents, thereby increasing genetic variation among offspring.

Step by step solution

01

Understanding Recombinant Chromosomes

Recombinant chromosomes are the result of a genetic recombination, a natural process involving the exchange of genetic material between two DNA molecules to form new combinations of genes on a chromosome. This occurs during sexual reproduction, more specifically during meiosis (the cell division that halves the number of chromosomes), forming gametes with a unique genetic makeup.
02

Definition of Parental Chromosomes

Parental chromosomes refer to the pair of matching (homologous) chromosomes that organisms possess. They come from each parent, one from the mother and one from the father. Each parental chromosome holds the same genes in the same order but the alleles for each trait may not be the same.
03

Comparing Recombinant and Parental Chromosomes

Recombinant chromosomes differ from the original parental chromosomes in that they carry a unique combination of alleles, different from the combination that was present in the parental chromosomes. The recombinant chromosome will therefore carry some genes from one parent and some from the other parent. This recombination results in an offspring that genetically differs from both parents, contributing to the genetic variation in populations.

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