Selective Breeding
Gbogbo ọrọ náà
Every breed of dog, every variety of wheat, and every high-yield dairy cow exists because humans chose which organisms to breed together. Selective breeding - also called artificial selection - is one of the oldest technologies in agriculture, yet its genetic principles are the same ones that drive modern biotechnology.
This short but important topic covers how farmers and breeders select plants and animals with desirable characteristics, breed them over many generations, and gradually shape entire populations. You will also learn why this process carries risks, particularly the reduction in genetic variation known as inbreeding.
Ebumnobi
- Understand how selective breeding can develop plants with desired characteristics
- Understand how selective breeding can develop animals with desired characteristics
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Selective Breeding. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- What is selective breeding also known as? A) Genetic modification B) Artificial selection C) Natural selection D) Cloning Answer: B
- Which of the following is a risk of selective breeding? A) Increased genetic variation B) Faster evolution C) Reduced gene pool D) Extinction of the species Answer: C
- From which wild plant have cauliflower, broccoli, and kale all been selectively bred? A) Wild carrot B) Wild brassica C) Wild wheat D) Wild rose Answer: B
- Why must selective breeding be repeated over many generations? A) The desired trait disappears after one generation B) Not all offspring will show the desired characteristic C) The organisms need time to mutate D) Inbreeding only occurs after ten generations Answer: B
- Which characteristic would a farmer most likely select for in dairy cattle? A) Thick fur B) High milk yield C) Long horns D) Dark colour Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Selective Breeding? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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