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 statements about sex chromosomes in mammals is correct?

Males carry two identical sex chromosomes (XX).

Males carry two different sex chromosomes (XY).

Both males and females carry only one sex chromosome.

Females carry two different sex chromosomes (XY).

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Verified step by step guidance

Understand the basic concept of sex chromosomes in mammals: mammals have two types of sex chromosomes, X and Y, which determine the biological sex of the individual.

Recall that females typically have two identical sex chromosomes, which are both X chromosomes (XX), meaning they are homogametic.

Recall that males typically have two different sex chromosomes, one X and one Y (XY), meaning they are heterogametic.

Evaluate each statement based on this knowledge: males do not carry two identical sex chromosomes, both males and females do not carry only one sex chromosome, and females do not carry XY chromosomes.

Conclude that the correct statement is that males carry two different sex chromosomes (XY), which aligns with the standard mammalian sex determination system.