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Mine Year 13 Alevel Biology > Topic 7 Defintions Alleles Etc….. > Flashcards

Topic 7 Defintions Alleles Etc….. Flashcards

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1
Q

What is the definition of Succession?

A

The change in an ecological community over time

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2
Q

What is the definition of phenotype?

A

The expression of the genes
And
Its interaction with the environment

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3
Q

What is the definition of Homozygous Alleles?

A

A pair of homologous chromosomes carrying

The same alleles for a single gene.

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4
Q

What is the definition of Heterozygous?

A

A pair of homologous chromosome carrying

Two different alleles for a single gene

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5
Q

What is the definition of Recessive Allele?

A

An allele only expressed if NO dominant allele is present

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6
Q

What is the definition of a dominant allele?

A

An allele that will always be expressed in the phenotype

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7
Q

What is the definition of Co-dominant?

A

Both alleles are equally dominant and expressed in the phenotype

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8
Q

What is the definition of Multiple Alleles?

A

More than two alleles for a single gene

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9
Q

What is the definition of sex-linkage?

A

A gene whose locus is on the X-Chromosome

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10
Q

What is the definition of Autosomal Linkage?

A

Genes that are located on the same chromosome

(Not the Sex-Chromosome)

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11
Q

What is the definition of Epistatis?

A

When one gene influences (affects or masks) the expressed of another gene

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12
Q

What is the definition of Monohybrid and Dihybrid?

A

Monohybrid: Genetic inheritance cross of a characteristics determined by one gene.

Dihybrid: Genetic inheritance cross for a characteristics determined by two genes

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13
Q

What is the definition of Hardy-Weinberg Principle?

A

Mathematical model which can be used
To predict allele frequencies within a population

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14
Q

What are the assumptions of Hardy-Weinberg principle?

A

No (Random) Mutations
No (Natural) Selection
Mating is Random
Population is large

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15
Q

What is the definition of Gene pool?

A

All the alleles of all the genes within a population at one time

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16
Q

What is the definition of a population:

A

All the individuals of one species in one area at one time

17
Q

What is the definition of Allele Frequency?

A

The proportion of an allele within the gene pool

18
Q

What is definition of speciation?

A

Creation of new species

19
Q

What is the definition of Genetic Drift?

A

Change in the Allele Frequency Within a population between generations

20
Q

What is the definition of Habitat?

A

Part of an ecosystem in which particular organisms live

21
Q

What is the definition of a community?

A

All the population of different species in the same area at the same time

22
Q

What is the definition of an Eco-System?

A

A community and the non-living of an all environment

23
Q

What is the definition of a niche?

A

An organism role within an ecosystem including position in the food web and habitat

24
Q

What is the definition of carrying capacity?

A

The maximum population size an ecosystem can support

25
Q

What is the definition of Abiotic Factors?

A

Non-Living conditions of an ecosystem

26
Q

What is the definition of Biotic Factors?

A

Living conditions of an ecosystem

27
Q

What is the definition Inter-Specific Competition?

A

When members of a different species are in competition for same resource in limited supply

28
Q

What is the definition of Intra-Specific Competition?

A

When members of the same species are in competition for resources and mate

Competition for a male links to courtships rituals

29
Q

What is the definition of a genotype?

A

Genotype is the genetic Constitution of an organism

30
Q

What is the definition of Disruptive Selection?
What shape does it create?

A

Disruptive Selection favours both extreme phenotype/allies but at different time due to environmental factors

Causes m-shaped curve

Mine Year 13 Alevel Biology (44 decks)

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