genotype definition
genetic constitution of an organism (all the alleles it has)
phenotype definition
expression of genes and its interactions with the environment
homozygous definition
when two alleles of the gene are the same
heterozygous definition
when two allelles of the gene are different
recessive allele definition
an allele that needs to be inherited from both mother and father to be expressed in the phenotype
dominant allele definition
only needs one allele to be expressed in phenotype
codominant definition
allelles both expressed in phenotypes as neither is recessive
multiple alleles definition
more than two alleles for a gene are present in the gene pool
sex-linkage definition
a genes who’s locus is only on a sex chromosome
autosomal linkage definition
genes that are located on the same chromosome (no sex-chromosome)
epistasis definition
when one gene masks the expression of a different gene at a different locus
monohybrid definition
genetic inheritance cross of a characteristic determined by one gene
dihybrid definition
genetic inheritance cross of a characteristic determined by two genes
mutation definition
changes in DNA base sequence
gene definition
sequence of bases on a section of DNA that codes for the amino acid sequence of a poly peptide
allele definition
one of the different forms of a gene
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5.1 photosynthesis25
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5.2 respiration30
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5.3 Energy And Ecosystems16
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5.4 nutrient cycles15
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6.1 stimuli, internal external detection and response55
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6.2 nervous co ordination32
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6.3 skeletal muscles24
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6.4 homeostasis38
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7.1 inheritance16
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7.2 populations10
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7.3 evolution may lead to speciation18
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7.4 Populations In Ecosystems37
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8.1 mutation DNA alter structure of proteins11
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8.2 stem cells/transcription factor/ cancer (gene expression controlled by number of features)26
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8.3 genome projects10
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8.4 recombinant DNA technology36
