Genetics and Heredity

19 terms by ree1245

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Chromosome

The threadlike strands inside the nucleus made up of DNA

DNA (Deoxyribonucleic acid)

A complex chemical that contains information about every part of an organism

Gene

The DNA codes on chromosomes that contain all the traits an organism inherits

recessive

A weak trait

dominant

A strong trait

Mutation

a permanent change in the structure of a gene or chromosome

traits (characteristics)

that are passed from parent to offspring are inherited

homozygous

gene pair for a particular trait are the same --
BB or bb

genotype

is the actual genetic make up of an individual

heterozygous

gene pair for a particular trait are different--
Bb

phenotype

is what that individual looks like

What are controlled by genes?

Traits

Who do we inherit genes in pairs from?

one from each parent

Are all genes dominant?

No, some genes are dominant and others are recessive

Do dominant genes hide recessive genes?

Yes

A change or mistake in the DNA is called what?

Mutation

What is the cellular process of sexual reproduction?

Meiosis

Who is the founder of Genetics?

Gregor Mendel

What did Gregor Mendel do?

Through the selective cross-breeding of common pea plants (Pisum sativum) over many generations, Mendel discovered that certain traits show up in offspring without any blending of parent characteristics. For instance, the pea flowers are either purple or white--intermediate colors do not appear in the offspring of cross-pollinated pea plants

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