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Science > Biology 1 > Flashcards

Biology 1 Flashcards

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Biology 101 flashcards
1
Q

meiosis

A

creation of sex cells

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2
Q

gametes

A

sperm or egg cells

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3
Q

homologous chromosomes

A

similar shape, size and genes

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4
Q

chromatin

A

a strand of dna, stringy like

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5
Q

homozygous chromosomes

A

have two of the same alleles for a trait

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6
Q

heterozygous chromosomes

A

two different alleles for a trait

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7
Q

alleles

A

alternative form or a version of a gene

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8
Q

prophase

A

chromosomes are visible

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9
Q

gene pool

A

all
combinations of alleles in a population

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10
Q

genetic diversity

A

gene flow into another generation through sexual reproduction and immigration

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11
Q

genetic drift

A

change in allele frequency in a population

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12
Q

quantitive observations

A

amount, measurements requiring tools, number based

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13
Q

qualitative observations

A

color, texture, smell, shape, relative size, and behavior; no measurements

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14
Q

inference

A

a conclusion made from previous knowledge

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15
Q

adaptations

A

anatomical features

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16
Q

adaptive value

A

adaptations that raise survival rates of a species

17
Q

species

A

a group of organisms sharing common traits; able to interbreed.

18
Q

food web

A

many connected food chains

19
Q

food chain

A

a feeding relationship in an ecosystem; producer and consumer

20
Q

dominant alleles

A

traits expressed in species

21
Q

recessive alleles

A

traits not expressed

22
Q

genotype

A

genetic trait of an individual

23
Q

nucleus

A

a double bounded membrane organelle that stores DNA

24
Q

DNA

A

genetic material inherited by living organisms

25
Q

chromatid

A

a condensed and shortened form of DNA

26
Q

chromosome

A

made of dna; sister chromatids held together by a center centromere

27
Q

sister chromatids

A

two identical copies of the same chromosome

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