2. Are all cows black and white?

Todays learning: (WALT)

  • Recognise that living things produce offspring of the same kind, but normally offspring vary and are not identical to their parents

Lesson Activities / Tasks

  • VIDEO: 'Are all cows black and white?'
  • Video Dialog
    • Animals of the same type or species are not all the same
    • Just like we have different breeds of dogs we also have different breeds of cows sheep pigs
    • The cows are all the same species but because they are so different we call them breeds Hereford Aberdeen Angus Friesian Stabiliser Highland
    • Domestic animals like sheep pigs and cows have been breed by man to give us all these different breeds
    • This breed of cow is a Friesian and is good at  producing milk
    • This breed of cow is an Aberdeen Angus it is good at producing meat
    • You know where calves come from
    • A bull and cow mate and 280 days later the cow gives birth to a calf
    • If the cow and bull are brown then all the calves are likely to be brown - but not the same brown.... or perhaps with white patches
    • Farmers are not too worried about the colour of the calves though
    • What do you think farmers want from their cows?
    • Well they want lots of meat if the cows are kept for meat
    • Or lots of milk if the cow is kept for milking.
    • Just like calves with brown parents are  not quite the same brown colour
    • or piglets in the same litter with the same parents are not all the same
    • Not all cows produce the same amount of milk.
    • So if a farmer measures how much milk each of his cows produce he can tell which cow produces the most milk
    • The calves from the cow which produces more milk will produce more milk
    • than calves from cows who produce less milk
    • So although the farmer mates all his cows with the bull so they all have calves and produce milk
    • he will only keep the calves from the cows who produce the most milk to replace old or sick cows when they stop producing milk
    • Those calves from cows who produce less milk will be sold and go for beef. 
    • By only keeping calves from cows who produce the most milk farmers have breed cows that can produce 20 litres of milk in a day - that's this many cartons of milk in 1 day!!! 
  • Complete relevant section of pupil workbook.

  • Plenary

  • Do quiz for first section answers


Outcomes: (WILF)

  • Explain how even animals with same parents are not exactly the same and will have different characteristics

Teaching notes:


Last modified: Monday, 25 November 2013, 7:00 PM