Relationship between DNA, chromosomes, gene, allele Flashcards

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1
Q

Explain DNA

A

DNA is a double helix that carries the genetic information of an organism.

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2
Q

What are chromosomes made out of and how many to we have in the human body?

A

Chromosome are made out of DNA and protein. We have 46 chromosomes in our body

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3
Q

Explain allele

A

allele is an alternative form of a gene, e.g, blue eyes

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4
Q

Explain gene

A

A gene is a section of DNA that codes for a specific characteristic, e.g., the colour of an eye.

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5
Q

Define recessive alleles

A

This is a type of allele that, when present on its own, won’t affect the individual. Two copies of the alleles need to be present for the phenotype to be expressed.

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6
Q

Define dominant allele

A

Only one copy of the dominant allele is required to express the trait.

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