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Livestock breeding

Livestock breeding. L.O. 1) Be able to describe the aims on selective livestock breeding. 2) Describe crosses using correct genetic terms. Question - What are A, B, C and D? Choose from Offspring, Female sex cell (gamete), Male sex cell (gamete) and Fertilised egg. A. D. C. B. Match up.

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Livestock breeding

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  1. Livestock breeding L.O. 1) Be able to describe the aims on selective livestock breeding. 2) Describe crosses using correct genetic terms

  2. Question - What are A, B, C and D? Choose from Offspring, Female sex cell (gamete), Male sex cell (gamete) and Fertilised egg A D C B

  3. Match up 1. Stronger A. Homo- 2. Weaker B. Dominant 3. Same C. Hetero- 4. Different D. Recessive

  4. Why carry out breeding programmes for farmed livestock? Belgium blue • Selective breeding Breeding the best individuals of ONE breed together to improve the standard of the breed. • Cross breeding Breeding individuals of different breeds together to combine the best features of both breeds. i.e. crossing beef cattle with dairy

  5. Genetic terms • Dominant Heterozygous • Recessive Homozygous • F1 • Chromosome • Gene • Allele • Phenotype • Genotype

  6. Monohybrid crossesCrosses looking at one characteristic • Boris the Belgium blue is heterozygous (two different genes) for big muscles. This is a dominant characteristic. • Annie the Ayrshire is homozygous (two genes the same) for a bony build. This is recessive. What would the two cattle's genotypes be. What would the punet square look like?

  7. Copy and complete – Using key terms Boris is a Belgium blue with two different genes for muscle. This means he is ________. His genotype is __. Muscles are a dominant characteristic so his phenotype is ______. This means bony is a _______ characteristic. When Boris was bred with Annie the Ayrshire we called their sons and daughters the ___ generation. Annie has _____ that can combine with Boris’s to give offspring with the best of both their breeds. This is ______ breeding.

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