Genetics Exam 1 Study Guide 2024

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Questions and Answers

Which of the following inheritance patterns can be analyzed using a pedigree?

Genotype of individuals (correct)
Sex-linked traits (correct)
Environmental effects
Probability of gametes

Only homozygous individuals can exhibit a dominant phenotype.

False (B)

What is the term used for the observable characteristics of an organism?

phenotype

A genotype that consists of two identical alleles is called __________.

<p>homozygous</p> Signup and view all the answers

Match the key terms with their definitions:

<p>Phenotype = Observable traits of an organism Genotype = Genetic makeup of an organism Allele = Alternative forms of a gene Co-dominance = Situation where both alleles in a heterozygote are fully expressed</p> Signup and view all the answers

Flashcards

Phenotype

The observable traits or characteristics of an organism.

Genotype

The genetic constitution of an individual, often represented by alleles.

Homozygous

Having two identical alleles for a specific gene.

Heterozygous

Having two different alleles for a specific gene.

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Co-dominance

A form of inheritance where both alleles in a heterozygote are fully expressed.

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Study Notes

Exam 1 Study Guide 2024

Practice many problems, focusing on pedigrees and multiple gene problems.
Studying through problem-solving and writing out what you know is more effective than just reviewing notes.
Given parental genetic information, predict offspring probabilities for crosses involving:
- 1-4 genes
- Sex-linked genes
- Epistasis
- Blood types (knowing genotype designations for blood type genes is crucial)
Given offspring information, determine parental genotypes and phenotypes.
Given a pedigree, determine the inheritance pattern and assign correct genotypes to individuals.
Given a genotype, identify possible gametes.
Calculate the probability of multiple offspring having a specific phenotype in a cross.
Understand environmental impacts on phenotypes and how twin studies inform the roles of genetics and environment in phenotype expression.