B14.3 Selective breeding Flashcards
What is selective breeding?
Process which humans breed plants and animals for desirable characteristics
What are some examples of desirable characteristics?
Disease resistance crops
Animals produce more meat or milk
Large or bright coloured or heavily scented flowers
How can wolves be selective bred?
Variation among a population of wolves
Selected wolves are selected to be artificially bred
Selected wolves are bred with a good temperament
Offspring are produced with good speed and other off spring with average speed
Selected offspring are picked and bread to make future generations
What are the problems with selective breeding?
Lack of alleles - means when a new disease emerges a lack of variation can mean that none of the plants/animals can cope with this change
What are the problems with bananas?
Lack of genetic variation in bananas leads to reduced variation - many of bananas are not resistant to the pathogens
What are the problems with pugs?
Pugs struggle to breathe due to their face
What are the problems with King charles spaniels?
Brains too big for their small skulls
