Mendelian Genetics

Mendelian Genetics

Objective

To understand how traits are inherited from generation to generation.

Open Ended

What is genetics?

What is a trait?

Inheritance of traits

Open Ended

What is a trait?

Multiple Choice

Passing on traits from parents to offspring

• Chromosome

• Genotype

• Heredity

• Allele

Multiple Choice

Passing on traits from parents to offspring

• Chromosome

• Genotype

• Heredity

• Allele

What is an allele?

Alleles Explained

Multiple Choice

A _______ is an alternative form a gene.

• chromosome

• sister chromatid

• allele

• telomere

Multiple Choice

The instruction of one allele covers up the instruction

of the other allele in a homologous pair. Symbolized by a capital letter.

• Recessive Allele

• Dominant Allele

• Heredity

• Trait

Multiple Choice

The instruction of one allele covers up the instruction

of the other allele in a homologous pair. Symbolized by a capital letter.

• Recessive Allele

• Dominant Allele

• Heredity

• Trait

Multiple Choice

Which of the following is an example of a heterozygous genotype?

• RR
• Rr
• rr

Multiple Choice

Tt is-

• homozygous dominant

• homozygous recessive

• heterozygous

• none of these

Multiple Choice

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT

• Tt

• tt

• tT

Inheritance of Traits

Mini-Lesson

Multiple Choice

The observable traits dictated by the genotype

• Phenotype

• Genotype

• Homozygous Recessive

• Homozygous Dominant

Multiple Choice

Which of the following best describes a GENOTYPE?

• The allele/genetic makeup of an organism.

• The physical expression of a trait.

Mendel's Law of Segregation

How do alleles separate?

Multiple Choice

During meiosis and gamete formation, paired alleles split up

• Phenotype

• Law of Segregation

• Genotype

• Dihybrid Cross

Mendel's Law of Independent Assortment

Sorting of chromosomes

Multiple Choice

During meiosis, the homologous pairs of chromosomes and the matching alleles are lined up independently.

Offspring are a mix of maternal genes and paternal genes.

This increases genetic variation.

• Homozygous Dominant

• Law of Segregation

• Crossing Over

• Independent Assortment

Multiple Choice

The letters on the TOP AND SIDE of a punnett square represent ______________.

• The combination of alleles in offspring.

• The possible alleles given by the parents following meiosis.

• The genotype and phenotype of offspring.

• The results of genetic mutations in offspring.

How Mendel's Pea Plants Help Us Understand Genetics

Mendel Simplified