Inheritance, Variation And Evolution - Aqa Biology Questions (GCSE Biology)

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What is speciation?

Two heterozygous pea plants (Tt) are crossed. What proportion of offspring are expected to be homozygous recessive (tt)?

In a simple Punnett square cross of two homozygous parents AA × aa, what proportion of offspring are heterozygous?

Which statement about continuous variation is correct?

Which process produces gametes with half the chromosome number?

Which molecule carries genetic instructions from parents to offspring?

Which piece of evidence supports evolution by natural selection?

Which is true about antibiotic resistance in bacteria?

In humans, what combination of sex chromosomes produces a female?

Which is an example of human-directed (artificial) selection?

What is a phenotype?

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