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

3. Extensions to Mendelian Inheritance

Sex Chromosome

Genetics

3. Extensions to Mendelian Inheritance

Sex Chromosome

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Multiple Choice

Which of the following best describes the role of the Y chromosome in an organism's survival?

The Y chromosome is identical in gene content to the X chromosome.

The Y chromosome contains genes primarily involved in male sex determination and fertility, but not genes critical for the survival of all individuals.

The Y chromosome contains most of the genes required for basic cellular functions.

The Y chromosome contains genes that are essential for the survival of all individuals.

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Verified step by step guidance

Understand the general function of the Y chromosome in genetics: it is one of the two sex chromosomes in many organisms, including humans, and plays a key role in determining male sex characteristics.

Recall that the Y chromosome is much smaller than the X chromosome and contains fewer genes, many of which are related to male sex determination and fertility rather than general cellular functions.

Recognize that the X chromosome carries many genes essential for basic cellular functions and survival, which is why individuals with only one X chromosome (like typical males) still survive, but the Y chromosome itself does not carry most of these essential genes.

Evaluate the given options by comparing the gene content and function of the Y chromosome: it is not identical to the X chromosome, does not contain most genes for basic cellular functions, and does not carry genes essential for survival of all individuals.

Conclude that the best description is that the Y chromosome contains genes primarily involved in male sex determination and fertility, but not genes critical for the survival of all individuals.