Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

4. Genetic Mapping and Linkage

Crossing Over and Recombinants

Genetics

4. Genetic Mapping and Linkage

Crossing Over and Recombinants

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Multiple Choice

Which of the following best describes the process of crossing over during meiosis?

The separation of sister chromatids into different daughter cells.

The fusion of gametes to form a zygote.

The exchange of genetic material between homologous chromosomes, resulting in new combinations of alleles.

The replication of DNA prior to cell division.

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Verified step by step guidance

Understand that crossing over is a process that occurs during meiosis, specifically in prophase I, where homologous chromosomes pair up.

Recognize that during this pairing, homologous chromosomes exchange segments of their genetic material, which is called recombination or crossing over.

Note that this exchange results in new combinations of alleles on each chromosome, increasing genetic diversity in the resulting gametes.

Differentiate crossing over from other processes such as the separation of sister chromatids (which happens later in meiosis), fusion of gametes (fertilization), and DNA replication (which occurs before meiosis begins).

Conclude that the best description of crossing over is the exchange of genetic material between homologous chromosomes, leading to new allele combinations.