Genetic terms Flashcards

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1
Q

Genes

A

A sequence of bases on a DNA molecule that codes for a protein which results in a characteristic

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2
Q

Alleles

A

A different version of the same gene

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3
Q

Locus/Loci

A

The fixed position that the allele of each gene is found on each chromosome in a pair

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4
Q

Genotype

A

The genetic constitution of an organism

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5
Q

Phenotype

A

The expression of the genetic constitution and its interaction with the environment

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6
Q

Dominant alleles

A

Always expressed in phenotype, even if there is only one copy

SHOWN BY CAPITAL LETTERS

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7
Q

Recessive alleles

A

Only expressed if there are two copies present

shown by lower case letters

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8
Q

Codominant alleles

A

Some alleles are both expressed in the phenotype because neither one is recessive

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9
Q

Homozygous

A

An organism carries two copies of the same allele

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10
Q

Heterozygous

A

An organism carries two different alleles for a gene

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