Genetic Inheritance (AQA GCSE Biology Combined Science): Flashcards
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10 cards from this deck
Gamete
Gamete
Reproductive cell with half chromosomes (23 in humans), haploid
Chromosome
Chromosome
DNA strand coiled around histones in cell nucleus
Gene
Gene
DNA segment with instructions to build a specific protein
Allele
Allele
Different versions or forms of a gene
Dominant allele
Dominant allele
Expressed in phenotype even if only one copy present
Recessive allele
Recessive allele
Only expressed if two copies present (homozygous)
Homozygous
Homozygous
Both alleles for a gene are the same (AA or aa)
Heterozygous
Heterozygous
Two alleles for a gene are different (Aa)
Genotype
Genotype
Genetic makeup of organism in terms of alleles (AA, Aa, aa)
Phenotype
Phenotype
Observable physical or physiological traits of an organism