Monohybrid Inheritance
Akopọ
Why does a tall pea plant crossed with a dwarf one give all tall offspring, then dwarfs reappear in the next generation? Monohybrid inheritance is the study of how a single gene is passed on, and with one simple tool, the Punnett square, you can predict the offspring of a cross and state the exact ratios.
In this lesson you will master the language of genetics (genotype, phenotype, homozygous, heterozygous, dominant, recessive), read pedigree diagrams, and use Punnett squares to predict 3:1 and 1:1 ratios. For Extended you will work test crosses, codominance and the ABO blood groups, and sex-linked conditions such as red-green colour blindness.
Awọn Afojusun
- Describe inheritance as the transmission of genetic information from generation to generation
- Describe genotype as the genetic make-up of an organism and in terms of the alleles present
- Describe phenotype as the observable features of an organism
- Describe homozygous as having two identical alleles of a particular gene
- State that two identical homozygous individuals that breed together will be pure-breeding
- Describe heterozygous as having two different alleles of a particular gene
- State that a heterozygous individual will not be pure-breeding
- Describe a dominant allele as an allele that is expressed if it is present in the genotype
- Describe a recessive allele as an allele that is only expressed when there is no dominant allele of the gene present in the genotype
- Interpret pedigree diagrams for the inheritance of a given characteristic
- Use genetic diagrams to predict the results of monohybrid crosses and calculate phenotypic ratios, limited to 1 : 1 and 3 : 1 ratios
- Use Punnett squares in crosses which result in more than one genotype to work out and show the possible different genotypes
- [Supplement] Explain how to use a test cross to identify an unknown genotype
- [Supplement] Describe codominance as a situation in which both alleles in heterozygous organisms contribute to the phenotype
- [Supplement] Explain the inheritance of ABO blood groups: phenotypes are A, B, AB and O blood groups and alleles are IA, IB and Io
- [Supplement] Describe a sex-linked characteristic as a feature in which the gene responsible is located on a sex chromosome and that this makes the characteristic more common in one sex than in the other
- [Supplement] Describe red-green colour blindness as an example of sex linkage
- [Supplement] Use genetic diagrams to predict the results of monohybrid crosses involving codominance or sex linkage and calculate phenotypic ratios
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Monohybrid Inheritance. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- An organism with two identical alleles of a gene is described as: A. heterozygous B. homozygous C. recessive D. codominant Answer: B
- A cross between two heterozygous individuals (Bb x Bb) gives a phenotype ratio of: A. 1:1 B. 2:1 C. 3:1 D. 1:2:1 Answer: C
- A black mouse (Bb) is crossed with a brown mouse (bb). The expected phenotype ratio is: A. all black B. 3 black : 1 brown C. 1 black : 1 brown D. all brown Answer: C
- A person with blood group AB has the genotype: A. IA IO B. IB IO C. IA IB D. IO IO Answer: C
- Red-green colour blindness is more common in males because: A. the allele is dominant B. males have only one X chromosome, so a single recessive allele is expressed C. the gene is on the Y chromosome D. females cannot carry the allele Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Monohybrid Inheritance? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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