Heredity And Mendel's First Law
Akopọ
Why does a black bull crossed with a black cow sometimes throw a red calf. Why do two hornless goats occasionally produce a horned kid. The answer is not chance: it is heredity, the orderly passing of traits from parent to offspring, and it follows rules precise enough to predict on paper before a single mating takes place.
In this lesson you will learn the vocabulary breeders and examiners share: gene, allele, dominant, recessive, genotype and phenotype. You will then meet Mendel's first law, the law of segregation, and use it to solve monohybrid cross problems on real farm traits, coat colour and the polled condition, working out exactly what a planned mating is likely to produce.
Awọn Afojusun
- Define heredity
- State Mendel's first law of inheritance
- Explain the terms gene, allele, dominant and recessive
- Solve a simple monohybrid cross problem using Mendel's first law
- Explain the application of Mendel's first law to animal breeding
Akọ̀wé Ẹ̀kọ́
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Heredity And Mendel's First Law. 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.
- In cattle, black coat colour (B) is dominant over red coat colour (b). What is the phenotype of an animal with genotype Bb? A. Red B. Black C. A mixture of red and black D. Cannot be determined Answer: B
- The actual pair of alleles an animal carries for a gene is called its: A. Phenotype B. Genotype C. Allele D. Chromosome Answer: B
- Mendel's first law states that: A. Genes for different traits assort independently B. The two alleles of a gene separate during gamete formation C. Dominant alleles always outnumber recessive alleles D. Offspring always resemble one parent exactly Answer: B
- Two heterozygous polled goats (Pp) are mated. What phenotype ratio is expected among the offspring? A. 1 polled : 1 horned B. 1 polled : 3 horned C. 3 polled : 1 horned D. All polled Answer: C
- An animal carrying two identical alleles for a gene, such as BB, is described as: A. Heterozygous B. Homozygous C. Recessive D. Hybrid Answer: B
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
