Cloning in Animals (OCR A-Level Biology A): Quizzes

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Cloning in Animals
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How do female aphids produce eggs during parthenogenesis?

Through mitosis to create diploid eggs

Why are identical twins always the same sex?

They share identical genetic information

What is created in step 2 of the SCNT process?

An enucleated egg

What is the key difference between reproductive and therapeutic cloning?

One creates an organism, the other stem cells

How many attempts were needed before Dolly the sheep was successfully cloned?

277 attempts

What type of animals are typically used in embryo twinning?

Elite female animals with valuable genetics

Why is cloning preferred over sexual reproduction for elite dairy cattle?

It guarantees offspring inherit specific traits

What is Large Offspring Syndrome in cloned animals?

Abnormally large size with disproportionate organs

In iSCNT, where does the mitochondrial DNA come from?

The egg donor species

What is the primary purpose of therapeutic cloning?

To produce stem cells for medical treatment

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