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

Sex-Linked Genes

Genetics

2. Mendel's Laws of Inheritance

Sex-Linked Genes

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Multiple Choice

Which of the following statements about sex-linked genes and blood type inheritance is correct?

Individuals with blood type O inherit the O allele from only their mother.

Blood type O results from a sex-linked recessive allele.

The presence of antigen A on red blood cells is determined by a gene on the X chromosome.

The genes determining ABO blood type are located on autosomes, not sex chromosomes.

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Verified step by step guidance

Understand that sex-linked genes are located on sex chromosomes (X or Y), while autosomal genes are located on non-sex chromosomes (autosomes).

Recall that the ABO blood group system is determined by the ABO gene, which is located on chromosome 9, an autosome, not on the X or Y chromosomes.

Recognize that blood type O results from a recessive allele at the ABO locus, but this locus is autosomal, so inheritance is not sex-linked.

Know that individuals with blood type O inherit one O allele from each parent, not just from the mother, because the gene is autosomal and inherited from both parents equally.

Conclude that statements claiming ABO blood type is sex-linked or that antigen A is determined by a gene on the X chromosome are incorrect, and the correct statement is that ABO blood type genes are autosomal.