Selective Breeding
Muhtasari
Long before scientists understood DNA, farmers and breeders were shaping the plants and animals around them. By choosing individuals with the best traits and breeding them together, generation after generation, humans have transformed wild grasses into high-yielding wheat and wolves into hundreds of dog breeds.
In this lesson you will learn how selective breeding works in both plants and animals, examine real examples of the process, and consider the risks that come with narrowing a population's gene pool.
Malengo
- Understand how selective breeding can develop plants with desired characteristics
- Understand how selective breeding can develop animals with desired characteristics
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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? A) Breeding organisms that are naturally selected by the environment B) Choosing organisms with desired traits and breeding them over many generations C) Genetically modifying organisms in a laboratory D) Allowing organisms to breed randomly Answer: B
- Which of the following is a risk of selective breeding? A) Increased genetic diversity B) Organisms become better adapted to the wild C) A reduced gene pool and increased chance of genetic defects D) Faster evolution of new species Answer: C
- Wild brassica has been selectively bred into broccoli by selecting for which feature? A) Large leaves B) Large flower buds C) Large terminal buds D) Thick stems Answer: B
- A farmer selectively breeds sheep for thick wool. Which step must be repeated? A) Cross the sheep with wild sheep once B) Select and breed the woolliest sheep over many generations C) Genetically modify the sheep's DNA D) Feed the sheep a high-protein diet Answer: B
- What does the term 'gene pool' mean? A) The total number of genes in one organism B) The total variety of alleles in a population C) The number of chromosomes in a cell D) The location of genes on a chromosome Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
