inheritance Flashcards

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1
Q

gene

A

a specific sequence of bases on a chromosome that codes for one or more polypeptides

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2
Q

allele

A

different forms of a gene. there can be many different forms of the same gene. most organisms carry two copies, one from each parent

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3
Q

nucleotides

A

unit of dna or rna. consists of a nitrogenous base, pentose sugar and phosphate

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4
Q

genotype

A

genetic constitution of an organism

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5
Q

phenotype

A

the expression of the genotype and its interaction with the environment

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6
Q

dominant

A

an allele that is always expressed in the phenotype of an organism. represented by a capital letter

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7
Q

recessive

A

an allele that is only expressed if two copies are present. represented by a lowercase letter

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8
Q

codominant

A

alleles are both expressed in the phenotype and neither is recessive

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9
Q

locus

A

fixed position of a gene on a chromosome

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10
Q

homozygous

A

organism carried two copies of the same allele

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11
Q

heterozygous

A

organisms carries two different alleles

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12
Q

carrier

A

individual carrying an allele that is not expressed in the phenotype that could be passed onto the offspring

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13
Q

multiple alleles

A

a gene that has two or more alleles. an organism will have two alleles, one on each homologous pair of chromosomes

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14
Q
A
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