Selective Breeding
Muhtasari
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.
Malengo
- Understand how selective breeding can develop plants with desired characteristics
- Understand how selective breeding can develop animals with desired characteristics
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Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Selective Breeding. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Fanyia kazi maswali haya kwenye programu
Fanyia kazi maswali haya kwenye programu
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Selective Breeding? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
