Question

why does selective breeding take many years

Answer 1

Future generations of selectively bred plants and animals will all share very similar genes . This could make some diseases more dangerous as all the organisms would be affected. Also, there is an increased risk of genetic disease caused by recessive alleles .

Answer 2

Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.

1. Humans have selectively bred plants and animals for thousands of years including:

• crop plants with better yields
• ornamental plants with particular flower shapes and colours
• farm animals that produce more, better quality meat or wool
• dogs with particular physiques and temperaments, suited to do jobs like herd sheep or collect pheasants.

Selective breeding aims to adapt an organism’s characteristics in a way that is desirable to the humans that breed them.