T2L12 Genetic inheritance and meiosis Flashcards

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1
Q

What is a locus

A

The location of a gene on a chromosome

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2
Q

Define recessive

A

An allele that only shows its effect on the phenotype when the dominant allele is not present (a recessive allele has been inherited from both parents)

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3
Q

Define dominant heterozygous

A

When only one of this allele is required to show was the phenotype. E.g Aa will show as phenotype because the dominant A is rpesent

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4
Q

Define gene

A

A length of DNA that codes for a polypeptide

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5
Q

Define genotype

A

The type of alleles or genes that an organism has

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6
Q

Define phenotype

A

The characteristics caused by the genotype or the observable effects of the genotype

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7
Q

Define Heterozygous

A

When an organism has two different copies of an allele

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8
Q

Define Allele

A

Version of a gene

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9
Q

Define homozygous

A

When an organism has two identical copies of a gene

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10
Q

Name two types of genetic ‘tracking’

A

Punnet square and Pedigree diagram

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