Inheritance Flashcards

1
Q

Allele

A

Different versions of the same gene

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2
Q

Amino acid

A

Small repeating units which make up protein

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3
Q

Chromosome

A

A long section of DNA containing lots of genes

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4
Q

DNA

A

The chemical which makes up the genetic material of an organism

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5
Q

Dominant

A

An allele which will always be expressed

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6
Q

Double helix

A

The spiral shape of DNA

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7
Q

Environmental variation

A

Differences caused by environmental factors

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8
Q

Gamete

A

Sex cell, e.g. egg, sperm, pollen

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9
Q

Gene

A

A short section of DNA which codes for a protein

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10
Q

Genome

A

All of the genetic material of an organism

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11
Q

Genotype

A

The set of alleles in an organism

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12
Q

Heterozygous

A

Two different alleles for the same characteristic

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13
Q

Homozygous

A

Two identical alleles for the same characteristic

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14
Q

Inherited variation

A

Differences caused by genes passed on from parent to offspring

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15
Q

Meiosis

A

Cell division which produces gametes

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16
Q

Phenotype

A

The physical result of a combination of alleles

17
Q

Polymer

A

A large molecule made up of many repeating units

18
Q

Recessive

A

An allele which is only expressed if two are present

19
Q

Sex chromosome

A

A chromosome which determines the sex of the organism

20
Q

Sex determination

A

The inheritance of two alleles which causes male or female offspring

21
Q

Trait

A

A characteristic of an organism

22
Q

Variation

A

Differences between individuals

23
Q

Genotype for a male

A

XY

24
Q

Genotype of a female

A

XX

25
Q

What is the probability of a child being male?

A

50%

26
Q

Haploid

A

A cell containing one set of chromosomes

27
Q

Diploid

A

A cell containing two sets of chromosomes

28
Q

How many chromosomes does a gamete contain?

A

23

29
Q

Describe the shape of a DNA molecule

A

Double helix

30
Q

What is a polygenic characteristic?

A

A characteristic determined by more than one pair of genes

31
Q

What are chromosomes made of?

A

DNA

32
Q

What word describes having two different alleles for a gene ?

A

Heterozygous