Heredity And Genetics
Muhtasari
Two parents with brown eyes can have a blue-eyed child; two parents of blood group A can have a child of blood group O; a condition can appear in a grandson but skip his mother entirely. None of this is random chance. It follows directly from how alleles are inherited, and a genetic diagram lets you predict it with confidence.
This lesson covers the vocabulary of inheritance, how to use genetic diagrams to predict the outcomes of a cross including sex determination and multiple-allele traits such as blood group, how to read a family pedigree, and the inheritance of named genetic conditions including one, cystic fibrosis, that can now be treated with gene therapy.
Malengo
- Know that genes exist in alternative forms called alleles which give rise to differences in inherited characteristics
- Know the meaning of the terms dominant, recessive, homozygous, heterozygous, phenotype, genotype, co-dominance, diploid and haploid
- Know that the sex of a person is controlled by one pair of chromosomes, XX in a female and XY in a male
- Explain how the sex of offspring is determined at fertilisation using a genetic diagram
- Understand that random fertilisation produces genetic variation of offspring
- Understand the role of multiple alleles in the inheritance of ABO blood groups
- Understand patterns of monohybrid inheritance using a genetic diagram and the probabilities of outcomes
- Understand how to interpret family pedigrees
- Describe the causes and effects of inherited conditions such as haemophilia and red-green colour blindness (sex-linked inheritance), polydactyly (dominant allele) and cystic fibrosis (recessive allele)
- Describe how gene therapy with viruses can be used to treat cystic fibrosis
- Understand that variation within a species can be genetic, environmental or a combination of both
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 Heredity And Genetics. 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.
- An individual with genotype Bb for a gene is described as: A) Homozygous dominant B) Homozygous recessive C) Heterozygous D) Co-dominant Answer: C
- Which genotype gives blood group AB? A) I^A I^A B) I^A i C) I^A I^B D) ii Answer: C
- Polydactyly is caused by which type of allele? A) Recessive B) Dominant C) Co-dominant D) Sex-linked recessive Answer: B
- Why are sex-linked recessive conditions more common in males? A) Males have two X chromosomes B) Males have only one X chromosome, so a recessive allele is not masked C) The Y chromosome carries the recessive allele D) Males cannot be carriers Answer: B
- Gene therapy for cystic fibrosis typically delivers a working gene using: A) A bacterium B) A harmless virus C) A plasmid injected into the blood D) Radiation 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 Heredity And Genetics? 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.
