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

2. Mendel's Laws of Inheritance

Mendel's Experiments and Laws

Genetics

2. Mendel's Laws of Inheritance

Mendel's Experiments and Laws

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Multiple Choice

Which type of cross in Mendel's experiments provided evidence against the theory of blending inheritance?

Backcross

Dihybrid cross

Monohybrid cross

Test cross

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Verified step by step guidance

Recall that the theory of blending inheritance suggested that offspring traits are a smooth blend of parental traits, which would mean traits mix and lose their distinct identities over generations.

Identify the type of cross Mendel used to test inheritance of a single trait, which is the monohybrid cross, involving parents that differ in one characteristic (e.g., flower color).

Understand that in a monohybrid cross, Mendel observed that traits did not blend but instead segregated into distinct forms in the offspring, with dominant and recessive traits appearing in predictable ratios.

Recognize that this observation of discrete trait inheritance in the monohybrid cross provided evidence against blending inheritance, supporting the idea of particulate inheritance (genes as discrete units).

Conclude that among the options, the monohybrid cross is the key experiment that disproved blending inheritance, as it clearly showed traits remain separate rather than blending.