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Science > SOL science prep 7th grade unit 6 > Flashcards

SOL science prep 7th grade unit 6 Flashcards

1
Q

study of how traits are inherited

A

Genetics

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2
Q

different form of gene
there are two of these for each gene (one from mom one from dad)

A

Allele

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3
Q

a train that will show if only one copy is present

A

Dominant trait/gene

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4
Q

a trait that will only show if two copys are present

A

Recessive Trait/Gene

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5
Q

same
ex: TT or tt

A

Homozygous

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6
Q

different
ex: Tt or Bb

A

Heterozygous

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7
Q

father of modern genetics
developed the principles of heredity by studying pea plants

A

Gregor Mendel

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8
Q

branch of biology that studys heredity (passing of characteristics from parents to offspring

A

Genetics

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9
Q

the different forms of the gene
ex: tall or short, freckles or no freckles

A

alleles (traits)

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10
Q

represented by an uppercase letter
when present, that trait will be expressed

A

Dominant Allele

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11
Q

represented by a lowercase letter
only expressed when none of the other type alleles are present

A

Recessive allele

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12
Q

organism has two dominat or two recessive alleles

A

Homozygous

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13
Q

organism has two different alleles

A

Heterozygous

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14
Q

letters
GENES
ex, BB, Bb, TT, Tt

A

Genotype

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15
Q

see physically
ex: purple flower, blonde hair

A

Phenotype

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16
Q

tool used to predict results of genetic cross
expressed as a ratio
each box filled with allele from top and left

A

Punnett Squares

17
Q

a third phenotype appears when the genotype is heterosygous
blend of dominat and resessive

A

Incomplete Dominance

18
Q

in heterozygous version both alleles expressed equally
two different capital letters
ex: sickle cells=SS
normal cells = NN
some of each = NS

A

Codominance

19
Q

gene is attached to x chromosome only
cannot be found on y
disorders more common in boys
men cannot be carriers

A

Sex-Linked Traits

Science (12 decks)

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