Chromosomes And Genes
Muhtasari
Inside almost every one of your cells is a full instruction manual for building you, written in DNA and packaged into chromosomes. The manual is divided into genes, and small differences between versions of a gene, called alleles, are why no two people (except identical twins) are exactly alike.
In this lesson you will see what chromosomes are made of, define a gene and an allele, and work out how the X and Y chromosomes decide whether a baby is a boy or a girl, predicting the familiar 1:1 ratio of sexes with a genetic diagram.
Malengo
- State that chromosomes are made of DNA, which contains genetic information in the form of genes
- Define a gene as a length of DNA that codes for a protein
- Define an allele as an alternative form of a gene
- Describe the inheritance of sex in humans with reference to X and Y chromosomes
- [Supplement] State that the sequence of bases in a gene determines the sequence of amino acids used to make a specific protein (knowledge of the details of nucleotide structure is not required)
- [Supplement] Explain that different sequences of amino acids give different shapes to protein molecules
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 Chromosomes And Genes. 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.
- A gene is best defined as: A. a whole chromosome B. a length of DNA that codes for a protein C. an alternative form of an allele D. a type of cell Answer: B
- An allele is: A. a length of protein B. an alternative form of a gene C. a sex chromosome D. a type of nucleus Answer: B
- The sex chromosomes of a human male are: A. XX B. XY C. YY D. XXY Answer: B
- What is the approximate ratio of male to female babies born, and why? A. 3:1, because of dominance B. 1:1, because equal numbers of X and Y sperm are made C. 2:1, because Y sperm swim faster D. 1:0, because the mother decides sex Answer: B
- Chromosomes are made of: A. protein only B. DNA C. carbohydrate D. lipid 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 Chromosomes And Genes? 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.
