Q.Explain how "Rosie" is different from a normal cow.

Step 1. Identify Rosie: she was the first transgenic cow, produced in 1997, carrying the human gene for alpha lactalbumin — a protein that is the most abundant protein in human breast milk, comprising about 25% of its total protein, and which also binds calcium/zinc and has bactericidal and anti-tumour activity. Step 2. Explain how she differs from a normal cow: an ordinary cow's milk contains only bovine milk proteins and lacks human alpha lactalbumin entirely, whereas Rosie's mammary glands were genetically modified (via the somatic cell nuclear transfer technique also used for cloning) to express and secrete the human protein into her milk, at a concentration of about 2.4 g/litre. Step 3. Explain why this matters: because Rosie's milk carries a protein naturally found in human breast milk, it is a more nutritionally balanced substitute for new …

Identify Rosie's transgenic modification (human alpha lactalbumin gene) and contrast her milk's composition an …

• Describing Rosie only as 'a genetically modified cow' without naming the specific protein (human alpha lactalbumin) her milk carries. …