unit 5 (genetics) Flashcards

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1
Q

What is the first step in translation?

A

the first mRNA codon attaches to the ribosomes

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2
Q

What is the second step of translation?

A

tRNA has an amino acid and an anticodon

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3
Q

What is the third step of translation?

A

the codon and anticodon attach

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4
Q

What is the fourth step of translation?

A

tRNA detached but leaves an amino acid

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5
Q

What is the fifth step of translation?

A

mRNA moves along the ribosome and the process restarts

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6
Q

What is the sixth step of translation?

A

“stop” codon ends translation

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7
Q

What happens in a gene mutation?

A

change in one gene in the DNA

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8
Q

What happens in a chromosomal mutation?

A

chromosome structure/amount changes

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9
Q

What is nondisjunction? draw a picture

A

homologous chromosomes do not separate during meiosis causing trisomy and monosomy

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10
Q

What is translocation? draw a picture

A

part of a chromosome breaks and attaches to another chromosome which replaces what should go there

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11
Q

What is insertion? draw a picture

A

adds to another chromosome after breaking off from another

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12
Q

What is inversion? draw a picture

A

reattaches backwards

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13
Q

What is the first step of DNA replication?

A

unzipping (enzymes break hydrogen bonds between base pairs)

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14
Q

What is the second step of DNA replication?

A

free-floating nucleotides attach base pairs to single-stranded DNA

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15
Q

What is the third step of DNA replication?

A

two identical copies of the original DNA are created half new half old

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16
Q

What does tRNA do?

A

transports amino acid to making protein

17
Q

What is the first step of transcription?

A

Enzyme unzips the DNA’s hydrogen bonds between base pairs

18
Q

What is the second step of transcription?

A

free-floating RNA nucleotides attach to complimentary DNA nucleotide by polymerase

19
Q

What is the third step of transcription?

A

mRNA is created

20
Q

What is the fourth step of transcription?

A

mRNA detaches from the DNA and goes to the ribosomes