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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

2. Mendel's Laws of Inheritance

Sex-Linked Genes

Genetics

2. Mendel's Laws of Inheritance

Sex-Linked Genes

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Multiple Choice

In the snail Cepaea nemoralis, which of the following best describes the inheritance pattern of shell color, which is determined by an autosomal gene?

Shell color is inherited only through the maternal line.

Shell color is determined by genes located on the sex chromosomes.

Shell color is inherited independently of the sex of the snail.

Shell color is influenced by environmental factors but not by genetics.

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Verified step by step guidance

Identify the type of inheritance described: Since the gene for shell color is autosomal, it means it is located on a non-sex chromosome, so it is not linked to sex chromosomes.

Understand that autosomal genes are inherited independently of the sex of the organism, meaning both males and females have an equal chance of inheriting the trait.

Recognize that maternal line inheritance refers to traits passed only from mother to offspring, often seen in mitochondrial DNA, which is not the case here since the gene is autosomal.

Consider environmental influence: if the problem states the gene determines shell color, then environmental factors are not the primary cause of variation in this trait.

Conclude that the best description is that shell color is inherited independently of the sex of the snail, consistent with autosomal inheritance patterns.