Family trees (AQA GCSE Biology): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
Purpose of family trees in genetics
Purpose of family trees in genetics
Track how traits pass from parents to children
Shape for males in family trees
Shape for males in family trees
Squares
Shape for females in family trees
Shape for females in family trees
Circles
Filled-in shape meaning
Filled-in shape meaning
Person has the condition
Empty shape meaning
Empty shape meaning
Person does not have the condition
Allele copies needed for recessive condition to show
Allele copies needed for recessive condition to show
Two copies
Allele copies needed for dominant condition to show
Allele copies needed for dominant condition to show
One copy
Type of allele causing cystic fibrosis
Type of allele causing cystic fibrosis
Recessive allele
Term for carrying recessive allele but not showing it
Term for carrying recessive allele but not showing it
Heterozygous
Type of allele controlling PTC tasting
Type of allele controlling PTC tasting
Dominant allele
Parents have trait, kids don't - dominant or recessive?
Parents have trait, kids don't - dominant or recessive?
Dominant
Tool to calculate inheritance probability
Tool to calculate inheritance probability
Punnett squares
CF probability from two heterozygous (Ff) parents
CF probability from two heterozygous (Ff) parents
or 25%
Letter notation: dominant vs recessive alleles
Letter notation: dominant vs recessive alleles
T for dominant, t for recessive