Variation, Genetics Flashcards

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1
Q

What is discrete variation?

A
  • members of a species decided into two or more distinct groups
  • ONE OR THE OTHER
  • eg ability to roll tongue or not
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2
Q

What is continuous variation?

A
  • variation which is smooth and continuous
  • does NOT fall into distinct groups
  • eg body mass, hand span
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3
Q

What is polygenic inheritance?

A

Characteristics that are controlled by the alleles of SEVERAL genes

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4
Q

What are alleles?

A

Different forms of the same gene

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5
Q

Different forms of the same gene are?

A

ALLELES!

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6
Q

What is the phenotype?

A

The physical appearance

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7
Q

What is the genotype?

A

The COMBINATION of alleles in a gene pair

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8
Q

What are genes part of?

A

Chromosomes

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9
Q

What is the dominant gene?

A

The allele that will ALWAYS show in the phenotype and masks a recessive allele

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10
Q

What is the allele that will ALWAYS show in the phenotype?

A

Dominant

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11
Q

What is the recessive allele?

A

The allele that will be masked by the dominan gene and only expressed in the phenotype when paired with another recessive allele

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12
Q

What is homozygous?

A

Two alleles that are the same

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13
Q

What is true breeding?

A

Two alleles that are the same (homo)

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14
Q

What is heterozygous?

A

Two alleles that are different

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15
Q

What are the two types of variation?

A

Discrete and continuous

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