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

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Multiple Choice

In humans, how many total chromosomes are typically present in each somatic cell?

Verified step by step guidance

Understand that humans are diploid organisms, meaning each somatic cell contains two sets of chromosomes—one set inherited from each parent.

Recall that the haploid number (n) in humans is 23, which represents the number of chromosomes in gametes (sperm or egg cells).

Since somatic cells are diploid, calculate the total number of chromosomes by multiplying the haploid number by 2: $2 \times 23$.

This calculation gives the total number of chromosomes present in a typical human somatic cell.

Recognize that this total number is 46 chromosomes, which includes 22 pairs of autosomes and 1 pair of sex chromosomes.

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