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1. Introduction to Genetics(0)

History of Genetics
(0)

Modern Genetics
(0)

Fundamentals of Genetics
(0)

2. Mendel's Laws of Inheritance(0)

Mendel's Experiments and Laws
(0)

Inheritance in Diploids and Haploids
(0)

Monohybrid Cross
(0)

Dihybrid Cross
(0)

Sex-Linked Genes
(0)

Probability and Genetics
(0)

Pedigrees
(0)

3. Extensions to Mendelian Inheritance(0)

Understanding Independent Assortment
(0)

Chi Square Analysis
(0)

Sex Chromosome
(0)

X-Inactivation
(0)

Overview of interacting Genes
(0)

Pleiotropy
(0)

Epistasis and Complementation
(0)

Variations of Dominance
(0)

Penetrance and Expressivity
(0)

Organelle DNA
(0)

Maternal Effect
(0)

4. Genetic Mapping and Linkage(0)

Mapping Overview
(0)

Crossing Over and Recombinants
(0)

Mapping Genes
(0)

Trihybrid Cross
(0)

Multiple Cross Overs and Interference
(0)

Chi Square and Linkage
(0)

Mapping with Markers
(0)

Positional Cloning
(0)

5. Genetics of Bacteria and Viruses(0)

Working with Microorganisms
(0)

Bacterial Conjugation
(0)

Bacterial Transformation
(0)

Bacteriophage Genetics
(0)

Transduction
(0)

6. Chromosomal Variation(0)

Chromosomal Mutations: Aberrant Euploidy
(0)

Chromosomal Mutations: Aneuploidy
(0)

Chromosomal Rearrangements: Overview
(0)

Chromosomal Rearrangements: Deletions
(0)

Chromosomal Rearrangements: Duplications
(0)

Chromosomal Rearrangements: Inversions
(0)

Chromosomal Rearrangements: Translocations
(0)

7. DNA and Chromosome Structure(0)

DNA as the Genetic Material
(0)

DNA Structure
(0)

Alternative DNA Forms
(0)

RNA
(0)

Bacterial and Viral Chromosome Structure
(0)

Eukaryotic Chromosome Structure
(0)

8. DNA Replication(0)

Semiconservative Replication
(0)

Overview of DNA Replication
(0)

Telomeres and Telomerase
(0)

Recombination
(0)

9. Mitosis and Meiosis(0)

Mitosis
(0)

Meiosis
(0)

Development of Animal Gametes
(0)

Development of Plant Gametes
(0)

10. Transcription(0)

Overview of Transcription
(0)

Transcription in Prokaryotes
(0)

Transcription in Eukaryotes
(0)

RNA Modification and Processing
(0)

RNA Interference
(0)

11. Translation(0)

The Genetic Code
(0)

Transfer RNA
(0)

Ribosomal Structure
(0)

Translation
(0)

Proteins
(0)

12. Gene Regulation in Prokaryotes(0)

Lac Operon
(0)

Tryptophan Operon and Attenuation
(0)

Lambda Bacteriophage and Life Cycle Regulation
(0)

Arabinose Operon
(0)

Riboswitches
(0)

13. Gene Regulation in Eukaryotes(0)

Overview of Eukaryotic Gene Regulation
(0)

GAL Regulation
(0)

Epigenetics, Chromatin Modifications, and Regulation
(0)

Post Translational Modifications
(0)

14. Genetic Control of Development(0)

Studying the Genetics of Development
(0)

Developmental Patterning Genes
(0)

Early Developmental Steps
(0)

15. Genomes and Genomics(0)

Overview of Genomics
(0)

Sequencing the Genome
(0)

Genomic Variation
(0)

Bioinformatics
(0)

Comparative Genomics
(0)

Genomics and Human Medicine
(0)

Functional Genomics
(0)

Proteomics
(0)

16. Transposable Elements(0)

Discovery of Transposable Elements
(0)

Transposable Elements in Prokaryotes
(0)

Transposable Elements in Eukaryotes
(0)

Regulation of Transposable Elements
(0)

17. Mutation, Repair, and Recombination(0)

Types of Mutations
(0)

Spontaneous Mutations
(0)

Induced Mutations
(0)

DNA Repair
(0)

18. Molecular Genetic Tools(0)

Genetic Cloning
(0)

Methods for Analyzing DNA
(0)

19. Cancer Genetics(0)

Overview of Cancer
(0)

Cancer Mutations
(0)

20. Quantitative Genetics(0)

Mathematical Measurements
(0)

Traits and Variance
(0)

Analyzing Trait Variance
(0)

Heritability
(0)

QTL Mapping
(0)

21. Population Genetics(0)

Hardy Weinberg
(0)

Allelic Frequency Changes
(0)

22. Evolutionary Genetics(0)

Overview of Evolution
(0)

Speciation
(0)

Phylogenetic Trees
(0)

14. Genetic Control of Development

Developmental Patterning Genes

14. Genetic Control of Development

Developmental Patterning Genes: Videos & Practice Problems

Video Lessons Practice Worksheet

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57 of 0

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Problem 57Multiple Choice

In Huntington's disease, the number of CAG repeats generally increases from one generation to the next. Based on this, which of the following statements is most likely true regarding the age of onset of symptoms in a child whose father has 42 CAG repeats on his 4th chromosome and the child has 45 CAG repeats on the same chromosome?

The child is likely to develop symptoms earlier than the father due to the expansion of CAG repeats.

The child is likely to develop symptoms later than the father due to the expansion of CAG repeats.

The father and child are equally likely to develop symptoms at the same age due to the expansion of CAG repeats.

The number of CAG repeats has no correlation with the onset of symptoms in Huntington's disease.

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