Introduction to Genetics Flashcards

1
Q

What is a gene?

A

The basic unit of inheritance - the instruction for a trait that is passed on from generation to generation.

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2
Q

What is a trait?

A

A physical or physiological characteristic that, when heritable, is consistently passed on from one generation to the next.

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3
Q

What is the central dogma of biology?

A

DNA –> RNA –> Protein

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4
Q

What are the two parts of a gene?

A

The coding region, and the promoter (or control) region.

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5
Q

What is the TATA box?

A

The promotor region of a gene, in eukaryotes it is mainly found 25 nucleotides upstream from the coding region and consists of mostly thymine and adanine.

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6
Q

What is chromatin?

A

A mixture of DNA and proteins called histones.

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7
Q

What are histones?

A

Small proteins that are basic and positively charged that associate with the negatively charged phosphate-sugar backbone of DNA.

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8
Q

Karyotype

A

The number and visual appearance of the chromosomes in the cell nuclei of an organism or species.

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