Genetic Disorders
Akopọ
Most of what your genes do passes unnoticed. Occasionally a single faulty instruction, or one chromosome too many, produces an effect large enough to shape a whole life. These are the genetic disorders, and they are among the few places in biology where a family tree, a fraction and a set of symptoms all describe the same thing. Learn to move between those three descriptions and this topic becomes arithmetic rather than memory.
In this lesson you will meet three inherited conditions that the specification names by example, and you will see why one of them shows up in every generation of a family while another can hide for decades in people who feel completely well. You will then look at a different kind of cause altogether, where nothing is wrong with any individual allele and the problem is simply that a cell finished up with the wrong number of chromosomes. By the end you will be able to read a family diagram, fill a Punnett square, quote a probability and explain the biology sitting behind the number.
Awọn Afojusun
- Some disorders are inherited. Students should be able to interpret data relating to genetic disorders such as polydactyly, cystic fibrosis, and sickle cell anaemia.
- Some inherited conditions are caused by inheritance of abnormal numbers of chromosomes, eg Down’s Syndrome is caused by the presence of an extra chromosome.
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Genetic Disorders. 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.
- Cystic fibrosis is caused by a recessive allele f. The working allele is F. What is the genotype of a carrier of cystic fibrosis? A. FF B. Ff C. ff D. A carrier has no alleles for the gene Answer: B
- Polydactyly is caused by a dominant allele. Which statement is correct? A. A person needs two copies of the allele to have the condition B. A person with one copy of the allele has the condition C. The condition always skips a generation D. Only females can have the condition Answer: B
- How many chromosomes are found in a body cell of a person with Down's syndrome? A. 23 B. 45 C. 46 D. 47 Answer: D
- Two carriers of cystic fibrosis have a child. What is the percentage chance that the child has cystic fibrosis? A. 0% B. 25% C. 50% D. 75% Answer: B
- Which of the following describes the event that leads to Down's syndrome? A. A dominant allele is inherited from one parent B. A recessive allele is inherited from both parents C. A pair of chromosomes fails to separate during meiosis D. A chromosome is lost during mitosis in the adult Answer: C
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Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Genetic Disorders? 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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