Anonymous

Why Is Selective Breeding Bad?

10 Answers

Anonymous Profile
Anonymous answered
Negative aspects of selective breeding:
1. Other important and necessary aspects may be lost over time.
2. The other animals or plants become redundant and un-necessary.
3. Could cause genetic problems and the animal may become sick easier.
4. If it is a plant that needs more water then it would be creating an environmental issue.
5. Disrupts the food chain and the natural order of life, there is already a law of nature in place to choose the best aspects (survival of the fittest)
6. Some selectively bred animals are more likely to become extinct.
7. Some animals may be lost as the selectively bred ones are preferred (dogs from wolves, wolves would eventually become extinct in preference to dogs).
Anonymous Profile
Anonymous answered
Selective breeding allows humans to control evolution, and this is the process which has created the Cow from the Aurochs, and Dogs from Wolves. Selective breeding has many good qualities: Dogs are much more obedient than wolves and Cows are easier to milk than Aurochs. One problem is that people will sometimes breed animals in such a way that makes them weaker and more vulnerable to extinction. The Turkey for example has been selectively bread for producing meat, but this has resulted an animal which would quickly die if humans did not take care of it.
Anonymous Profile
Anonymous answered

Okay guys read these and check if they are okay please!
I did it for homework

Do you think Selective breeding
is a good or bad thing?

  Good
things: 

  • Lots of crops that are
    resistant from disease.

  • Plants can also develop high quality crops
    that can defend against pests.

  • Better quality things, such
    as ‘Better wool from sheep’.

  • Cows have really good high
    milk yield.

  • When putting certain animal’s
    milk together there would be more nutrients.

  • Increasing
    milk yield by selecting bulls
    from high yield herds and breeding them with cows that have the best milk
    production.

  • You get a variety of plant,
    or to improve the features of a particular plant. This might mean more petals,
    a different colour of flower, bigger seeds/fruit, or higher crop yield.

Bad things:

  • It takes a while.

  • Other important and
    necessary aspects may be lost over time.

  • Could cause genetic
    problems and the animal may
    become sick easier.

  • Selective breeding is bad
    because it disrupts the food chain.

 


aileeny Profile
aileeny answered
The negatives of selective breeding are that recessive genes are inherited in a double dose ,ie from both parents. Most recessive genes are mutations and most mutations are harmful. We can see this a lot in pedigree dog breeding where most breeds are now disease specific and many pedigree dogs suffer the terrible consequences of inbreeding.
aileeny Profile
aileeny answered
Because it brings together in individuals two copies of a mutated recessive gene. Because most mutations are harmful and even lethal then selectively bred species, ie dogs, suffer from breed specific traits/diseases.
aileeny Profile
aileeny answered
The disadvantages of mankinds artificial selection methods are that mutated bad recessive genes are passed onto the offspring is double doses, ie the same disease causing recessive genes come as a pair in the created individuals as both parents,being related (OVER AND OVER AGAIN) are both carriers for the same familial mutation///. Another  good example is the white coat colour and deafness. Because the alleles ( paired genes) for white coat colour and for deafness lie in the same locus ( area) or the dog genome then during the recombination of parental chromosomes, the break ( exchange of chromosomal material) does not always happen between the colour and deafness alleles and so they are often inherited together as a package so to speak . So lets say that the breeder wants white dogs ( the so called desired trait) he/she also gets the so called undesirable trait, deafness because of selection of white coat colour.  Hope this has answered your query/   Intensified selective breeding obviously brings along more familial mutations ,causing the individual many health problems. This is what has happened of recent years because the breed clubs , ie Crufts in London England, have brought in so called Standards.   This is not compatable with animal welfare.
Anonymous Profile
Anonymous answered
Selective breeding is bad because it disrupts the food chain
Anonymous Profile
Anonymous answered
Hi I have just done this topic and it may a few years down the line wipe most pure bred animals as they wont be needed and people wont want them

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