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

1. Introduction to Genetics

History of Genetics

Genetics

1. Introduction to Genetics

History of Genetics

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Multiple Choice

During Gregor Mendel's time in the mid-19th century, what was the scientific understanding of genes and chromosomes?

Genes and chromosomes were unknown concepts; Mendel described 'factors' without knowledge of their physical basis.

Both genes and chromosomes were discovered and widely accepted before Mendel's experiments.

Genes and chromosomes were well understood, and Mendel used these terms in his experiments.

Chromosomes were known, but the concept of genes had not yet been proposed.

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Verified step by step guidance

Step 1: Understand the historical context of Gregor Mendel's work, which took place in the mid-19th century (around the 1860s).

Step 2: Recognize that during Mendel's time, the concepts of 'genes' and 'chromosomes' as we know them today were not yet discovered or understood.

Step 3: Mendel described hereditary units as 'factors' based on his experiments with pea plants, but he did not know their physical nature or location within cells.

Step 4: The discovery of chromosomes and the formal concept of genes came later, after Mendel's work, through advances in cytology and genetics in the early 20th century.

Step 5: Therefore, the correct understanding is that Mendel worked with abstract 'factors' without knowledge of genes or chromosomes, which were unknown concepts at his time.