Inheritance of group bloods (Edexcel GCSE Biology): Flashcards

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Inheritance of group bloods
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What is codominance in genetics?

Both alleles are expressed equally in the phenotype.

What are the genotypes for chicken feather color?

WW (white), BB (black), BW (speckled).

What phenotype results from WW genotype?

White feathers.

What allele combinations create blood group A?

IAIA or IAIO.

Which blood group is universal donor?

Blood group O.

How is blood group AB inherited?

From IA allele in one parent and IB in another.

Are IA and IB alleles dominant or recessive?

Both are dominant over IO.

How many alleles can control a single gene?

More than 2 alleles can control a single gene.

For blood type B, what are the possible genotypes?

IBIB or IBIO.

Which blood groups can type A receive?

A or O blood groups.

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