Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 7: Problem 26

Are sister chromatid exchanges effective in producing genetic variability in an individual? in the offspring of individuals?

Short Answer

Expert verified
Answer: Sister chromatid exchanges play a limited role in producing genetic variability in the offspring of individuals by influencing recombination during meiosis. However, they have a minimal impact on genetic variability within individuals, as the exchanges usually occur between identical chromatids.

Step by step solution

01

Understanding sister chromatid exchange

Sister chromatid exchange refers to a process where two replicated chromosomes (sister chromatids) within a cell exchange genetic material during mitosis or meiosis. This process can be initiated by cellular events such as DNA recombination or DNA repair.
02

Role of sister chromatid exchange in genetic variability within an individual

Sister chromatid exchange does not create any new genetic information, but it can lead to the reshuffling of existing genetic material within the chromosomes. However, sister chromatid exchanges usually occur between sister chromatids (which are identical copies of the same chromosome) resulting in no significant genetic variability. In most cases, the sister chromatid exchange has little or no impact on the genetic variability within an individual.
03

Role of sister chromatid exchange in genetic variability in the offspring of individuals

During meiosis, sister chromatid exchanges can have a role in genetic variability. Meiosis involves homologous chromosome pairing and recombination, leading to the production of genetically unique gametes. Although sister chromatid exchanges themselves do not introduce new genetic variability, they can influence the outcome of recombination events between homologous chromosomes, which contributes to genetic variability in offspring. However, the overall contribution of sister chromatid exchanges to genetic variability in offspring is limited compared to other mechanisms, such as crossing over between homologous chromosomes.
04

Conclusion

In conclusion, sister chromatid exchanges can play a limited role in producing genetic variability in the offspring of individuals by influencing recombination during meiosis. However, they have a minimal impact on genetic variability within individuals, as the exchanges usually occur between identical chromatids.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What three essential criteria must be met in order to execute a successful mapping cross?

Why is a 50 percent recovery of single-crossover products the upper limit, even when crossing over always occurs between two linked genes?

Phenotypically wild \(\mathrm{F}_{1}\) female Drosophila, whose mothers had light eyes (It) and fathers had straw (stw) bristles, produced the following offspring when crossed with homozygous light-straw males:$$\begin{array}{lc} \text { Phenotype } & \text { Number } \\ \hline \text { light-straw } & 22 \\ \text { wild } & 18 \\ \text { light } & 990 \\ \text { straw } & \frac{970}{2000} \end{array}$$ Compute the map distance between the light and straw loci.

Why does more crossing over occur between two distantly linked genes than between two genes that are very close together on the same chromosome?

Three loci, mitochondrial malate dehydrogenase that forms \(a\) and \(b(M D H a, M D H b),\) glucouronidase that forms 1 and \(2(G U S 1\) \(G U S 2\) ), and a histone gene that forms \(+\) and \(-(H+, H-),\) are located on chromosome \(\\# 7\) in humans. Assume that the \(M D H\) locus is at position \(35, G U S\) at position \(45,\) and \(H\) at position 75 A female whose mother was homozygous for \(M D H a, G U S 2,\) and \(H+\) and whose father was homozygous for \(M D H b, G U S 1,\) and \(H-\) produces a sample of 1000 egg cells. Give the genotypes and expected numbers of the various types of cells she would produce. Assume no chromosomal interference.
See all solutions

Recommended explanations on Biology Textbooks

Communicable Diseases

Read Explanation

Bioenergetics

Read Explanation

Genetic Information

Read Explanation

Ecosystems

Read Explanation

Energy Transfers

Read Explanation

Biological Processes

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free