Genetics Flashcards

1
Q

What does cholesterol do to the cell membrane?

A

Cholesterol binds the cell membrane

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2
Q

What is endocytosis?

A

Sends in the cell, phagocytosis- to eat.
Uses vesicles
Pinocytosis-to drink

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3
Q

Exocytosis?

A

Sends vesicle to outside of cell.

Tears, neurotransmitters

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4
Q

What does microvilli do?

A

Increase surface area and is able to absorb more material

Intestines absorb

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5
Q

What is the difference between a DNA molecule, a chromosome, and a gene?

A

DNA-molecule
Chromosome- composed of
Gene- piece of the chromosome

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6
Q

1 chromosome=how many DNA molecules?

A

1

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7
Q

How many chromosomes in a human?

A

46

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8
Q

How many cells do sperm and egg have?

A

23

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9
Q

How many cells in a potato?

A

48

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10
Q

How many cells in a house fly?

A

12

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11
Q

How many cells in a hydra?

A

32

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12
Q

What are the two kinds of chromosomes and what does each contribute?

A

Autosomes-genetic hereditary info

Sex chromosomes- certain genetic traits linked to a persons sex

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13
Q

Male is what variables?

A

Xy

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14
Q

Female is what variables?

A

xx

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15
Q

What is a genotype?

A

2 alleles inherited for a specific gene

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16
Q

Genetic composition is to ——–

Physical composition is to——–

A

Genotype

Pheonotype

17
Q

What are the two ways cells divide and explain each

A

Mitosis- 1 cell division, creates two daughter cells with 4 chromosomes in each.
Meiosis- 2 divisions, result is 4 daughter cells, 2 chromosomes in each

18
Q

Who came up with the DNA model?

A

Watson and crick along with Franklin

19
Q

What is the DNA molecule composed of and explain

A

Sugar phosphate backbone and rungs, which are nucleotide bases.

20
Q

What is binary fission in bacteria?

21
Q

What recognizes it’s self from self and non self cels?

A

Sugar chains, carbohydrates.

22
Q

What is the role of transcription?

A

Makes RNA from DNA

23
Q

What is the role of translation?

A

Makes protein based on info in mRNA.

24
Q

What does RNA do?

A

Messenger RNA moves into the nucleus, translates the DNA instead of thymine. Once it translates it moves out of the nucleus.

25
How many nucleotides make up an amino acid in DNA?
3
26
What is a codon?
3 bases into 1 amino acid. AUGC
27
What is point mutation and what disease does it cause?
1 amino acid is incorrect. | Causes sickle cell anemia
28
What is a frame shift?
Many amino acids change
29
What is silent mutation?
Protein is fine
30
Why did sickle cell anemia develop?
Hemaglobin S in red blood cells. Causes them to turn banana shaped and clog
31
What is the difference between mutagen and mutation?
Mutagen is a physical or chemical agent that changes DNA, increasing frequency of mutations
32
What is an allele?
The fraction of all chromosomes in the population that carry that allele
33
Example in sex linked trait?
Red green color blindness found in men,x mostly
34
What is difference of homozygous, and heterozygous?
Homo- two of the same alleles. RR or rr | Hetero- two diff alleles. Rr