Inheritance/punnet squares Flashcards

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1
Q

What does inheritance mean

A

Characteristics they adopt from there parents

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2
Q

what does alleles mean

A

different versions of the same gene

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3
Q

what is a dominant allele

A

an allele that overrides the other allele and determines how to organism appears and the recessive allele is hidden

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4
Q

what does heterogeneous mean

A

when the organism with two different alleles of a gene

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5
Q

what does homozygous mean

A

characteristics those where the 2 alleles are the same arc called homozygous

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6
Q

what does genotype mean

A

alleles an organism has

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7
Q

what does phenotype mean

A

how does the organism appears

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8
Q

what is the punnet square

A

predicts the genotypes and phenotype for offspring produced by 2 parents

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9
Q

what is the punnett square

A

predicts the genotypes and phenotypes for offspring produced by 2 parents

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10
Q

show how is the punnet square layed out

A

parents gametes are shown at the top

possible alleles in the gametes are at the top of the column and start of each row

each square shows the result of the alleles

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11
Q

give examples of inherited disorders

A

systic fibrosis (cf) caused be a recessive allele

pterodactyl (having a extra finger or toe) caused by a dominant allele

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12
Q

what can gene therapy and screening do

A

reduce the symptoms of people with cyctic fibrosis.

embryo screening can be used to detect genetic disorders in embryos and alter the human genome and to abortion should a genetic disorder be detected (some people have ethical objections)

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