An organism with genotype Bb is
Salam Academy Original Practice · Proposed mark scheme
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12 questions
The observable characteristics of an organism are its
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A recessive allele shows in the phenotype only when
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Two heterozygous parents (Bb × Bb) are crossed. The expected phenotype ratio is
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Tt × tt gives offspring in the ratio
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Two carriers (Cc × Cc) of cystic fibrosis have a child. What is the probability, as a decimal, that the child has cystic fibrosis (cc)?
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From Cc × Cc, what is the probability (decimal) that a child is a carrier (Cc)?
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A test cross is used to find out whether a dominant-phenotype organism is
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In a test cross, all offspring show the dominant phenotype. The unknown parent is most likely
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A person with genotype has blood group
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Two unaffected parents have an affected child. The condition is
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Red–green colour blindness is more common in males because
Salam Academy Original Practice · Proposed mark scheme