Table of contents

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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 statements best describes sex chromosomes?

They are chromosomes that determine the biological sex of an organism.

They are chromosomes that carry only genes related to metabolism.

They are always present in equal numbers in both males and females.

They are chromosomes that are never involved in inheritance.

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Verified step by step guidance

Understand the definition of sex chromosomes: Sex chromosomes are specific chromosomes that play a key role in determining the biological sex of an organism.

Recall that sex chromosomes differ from autosomes, which are chromosomes that carry genes unrelated to sex determination.

Recognize that sex chromosomes carry genes that influence sexual development, but they can also carry other genes not directly related to sex.

Note that sex chromosomes are not always present in equal numbers in males and females; for example, in humans, females have two X chromosomes (XX) and males have one X and one Y chromosome (XY).

Conclude that the best description of sex chromosomes is that they are chromosomes that determine the biological sex of an organism.