Mendelian Genetics

Patterns of Inheritance

Multiple Select

Which of the following are examples of a Genetic trait?

• Polydactyl Cat

• A cat that can high-five

• Gray cat

• Rainbow Cat

Multiple Choice

Which of the following are examples of a continuous variation?

• Colors of frogs

• Acorn length

• Tongue rolling

• Weight of oranges

Multiple Choice

How is DNA stored in our cells?

• As long strands in the nucleus

• As chromosomes in the cytoplasm

• As chromosomes in the nucleus

• As long strands in chloroplasts

Genetic Information

DNA is the genetic code.

DNA is stored as chromosomes in the nucleus

Specific proteins and traits are coded as "genes", which are specific sections of DNA.

Alleles

A version of a gene.

Different combinations of alleles can change how a gene is expressed.

Can be dominant or recessive.

Dominant: Usually capital letter (ex. D)
Recessive: Usually lower case letter (ex. d)

Genotype

The genes that an organism has.

Describes the arrangement of alleles

Homozygous: 2 of the same
Heterozygous: 2 different alleles

TT= homozygous dominant
Tt= heterozygous

What the organism looks like.

Determined by the genotype.

Phenotype

What will the offspring look like?

1. Find the genotype of the parents

2. Create a cross

3. Fill in the cross