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Biology > Variation and inheritance > Flashcards

Variation and inheritance Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

What is the meaning of variation?

A

It means having different characteristics

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2
Q

What is continuous variation?

A

When characteristics shows a continuous range of values between a minimum and a maximum?

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3
Q

What is the meaning of polygenic?

A

A characteristic which is controlled by more than one gene

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4
Q

What are examples of continous variation in humans

A

skin colour, height, human heart rate, etc

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5
Q

What are examples of contiuous variation in plamts?

A

Seed mass

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6
Q

Would polygenic features show continous or discrete variation and why?

A

continous variation, because these characteristics shows a continous range of values

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7
Q

What is discrete variation?

A

Variation where measurements fall into distinct groups

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8
Q

What is discrete variation controlled by?

A

One gene

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9
Q

What are examples of discrete variation?

A

Blood group type, eye colour, hair colour

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10
Q

What are genes a part of?

A

Chromosomes

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11
Q

What is a monohybrid cross?

A

Genetic cross involving one characteristic

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12
Q

Whta is a phenotype?

A

The physical appearance of an organism

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13
Q

What is a genotype?

A

The set of alleles an organism possesses

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14
Q

What is a gameate?

A

Sex cells

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15
Q

What are alleles?

A

Different forms of the same gene eg blue or brown for eye colour

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16
Q

What is the meaning of dominant?

A

Allele which is always expressed in the phenotype .Represented by capital letter

17
Q

What is the menaing of recessive?

A

Allele which i sonly expressed inthe phenotype when tow are present. Represented by lower case letter

18
Q

What is P1?

A

Parents of the cross first generation second generation

19
Q

Human gametes cells contain this number of chromosomes?

A

23

20
Q

Human liver and heart cells contain this number of chromosomes

A

46

21
Q

What is the meaning of homozygous?

A

Both alleles are identical

22
Q

Whta is the word for when both alleles are identical?

A

Homozygous

23
Q

WHt is the meaning of heterozygous?

A

alleles are different

24
Q

What is the word for when allels are different?

A

Heterozygous

25
Q
A

Biology (22 decks)

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