{"id":18968,"date":"2022-05-16T10:30:35","date_gmt":"2022-05-16T05:00:35","guid":{"rendered":"https:\/\/cbselibrary.com\/?p=18968"},"modified":"2023-11-10T11:50:58","modified_gmt":"2023-11-10T06:20:58","slug":"frank-icse-class-10-biology-solutions-principles-of-genetics","status":"publish","type":"post","link":"https:\/\/cbselibrary.com\/frank-icse-class-10-biology-solutions-principles-of-genetics\/","title":{"rendered":"Frank ICSE Class 10 Biology Solutions – Principles of Genetics"},"content":{"rendered":"
PAGE NO:35<\/strong><\/span> Solution 2:<\/strong><\/span> Solution 3:<\/strong><\/span> Solution 4:<\/strong><\/span> Solution 5:<\/strong><\/span> Solution 6:<\/strong><\/span> Solution 7:<\/strong><\/span><\/p>\n Solution 8:<\/strong><\/span> Solution 9:<\/strong><\/span> Solution 10:<\/strong><\/span> Solution 11:<\/strong><\/span> Solution 12:<\/strong><\/span> Solution 13:<\/strong><\/span> Solution 14:<\/strong><\/span> Based on dihybrid ratio of 9:3:3:1 in F2 generation, Mendel observed that when a plant with two dominant alleles was crossed with another having the corresponding recessive alleles it was possible to obtain new combinations of characters where a plant had one dominant and the other recessive allele. These were new recombinations were not present in either parent or F1 generation.<\/p>\n PAGE NO :36<\/span><\/strong> Solution 16:<\/strong><\/span> Solution 17:<\/strong><\/span> Solution 18:<\/strong><\/span> Solution 19:<\/strong><\/span> Solution 20:<\/strong><\/span> Solution 21:<\/strong><\/span> Solution 22:<\/strong><\/span><\/p>\n Solution 23:<\/strong><\/span> Solution 24:<\/strong><\/span> Solution 25:<\/strong><\/span> Solution 26:<\/strong><\/span> Solution 27:<\/strong><\/span> Solution 28:<\/strong><\/span> Solution 29:<\/strong><\/span> Solution 30:<\/strong><\/span> Solution 31:<\/strong><\/span> Solution 32:<\/strong><\/span> Solution 33:<\/strong><\/span> Solution 34:<\/strong><\/span> PAGE NO :37 Solution 36:<\/strong><\/span><\/p>\n Biology<\/a>Chemistry<\/a>Physics<\/a>Maths<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" Frank ICSE Class 10 Biology Solutions – Principles of Genetics PAGE NO:35 Solution 1: Gregor Johann Mendel. Solution 2: Genetics is the branch of biology that deals with the study of transmission of characters from parents to offspring. Solution 3: The term heredity may be defined as the transmission of genetically based characteristics from parents … Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[172,6442,3034],"tags":[6813,6808,6807,6809,6806,6812,6810,6811],"yoast_head":"\n
\nSolution 1:<\/strong><\/span>
\nGregor Johann Mendel.<\/p>\n
\nGenetics is the branch of biology that deals with the study of transmission of characters from parents to offspring.<\/p>\n
\nThe term heredity may be defined as the transmission of genetically based characteristics from parents to offspring.<\/p>\n
\nMonohybrid cross.<\/p>\n
\nDihybrid cross ratio is 9:3:3:1.<\/p>\n
\n<\/p>\n\n
\nGregor Johann Mendel was a biologist who carried out experiments on garden pea and derived a few fundamental principles in genetics. He is called the ‘Father of Genetics’.<\/p>\n
\nMendel’s laws are:<\/strong><\/p>\n\n
\nMonohybrid cross is one where the parents used for hybridization differ in only one pair of contrasting characters or alleles.<\/p>\n
\n<\/p>\n
\nThe law of segregation explains that the characteristics of an organism are determined by internal alleles that occur in pairs. These allele pairs separate during meiosis in gamete formation and the pair gets restored upon random fusion in zygote.<\/p>\n
\nLaw of segregation is also called the law of purity of gametes because the two members of a pair of factors do not blend but segregate or separate into different gametes.<\/p>\n
\nAccording to the law of independent assortment when there are two pairs of contrasting characters, the distribution of the members of one pair into the gametes is independent of the distribution of the other pair.<\/p>\n
\nSolution 15:<\/strong><\/span>
\nImportance of Mendel’s Laws:<\/strong><\/p>\n\n
\nExceptions to Mendel’s Laws:<\/strong><\/p>\n\n
\nMendel performed his experiments on the garden pea plant or Pisum sativum.<\/p>\n
\nSex chromosomes determine the sex of a child in humans.<\/p>\n
\n<\/p>\n
\n<\/p>\n
\nMendel’s work did not receive much notice till 1900. Then three scientists: Hugo de Vries, Carl Correns and Erich von Tschermak working independently rediscovered his work and brought Mendel’s experiment to limelight.<\/p>\n\n
\nThe sex of the zygote is determined by the sperm which fertilizes the ovum. If an X bearing sperm fuses with an ovum in man, the offspring would be female and if a Y chromosome bearing sperm fuses with an ovum the offspring will be a boy.<\/p>\n
\nThe inheritance of sex linked genes controlling sex linked characters is called sex linkage or sex linked inheritance.<\/p>\n
\nHaemophilia is X-linked inherited disease in which the diseased person is unable to synthesize a normal blood protein called Antihaemophilic globulin that helps in clotting. Haemophilia is also called Bleeder’s disease as the haemophilic person bleeds for a long time even from a minor cut.<\/p>\n
\nColour blindness is a sex-linked inherited disease in which the diseased person is not able to distinguish between red and green colour.<\/p>\n
\nCause of Haemophilia –<\/strong> Haemophilia is an X-linked inherited disease. Homozygosity for recessive haemophilia gene is must to be seen in a female while a single affected X chromosome makes the male a haemophilia victim.
\nCause of Colour Blindness –<\/strong> Colour blindness is the effect of a recessive gene. In case of female, both the X chromosomes must have the recessive gene but as males have only one X chromosome, just a single affected chromosome causes colour blindness.<\/p>\n
\nMore males are affected by sex linked diseases because they have a single X chromosome and the sex linked diseases occur due recessive gene on X chromosome.<\/p>\n
\nA man can never transfer a sex-linked gene directly to his son because the son inherits only the Y chromosome from his father and the sex linked diseases are present on the X chromosome.<\/p>\n
\nThe progeny of the woman and the haemophilic man will have one son and one daughter as colorblind, one daughter as a carrier and one son will be normal.<\/p>\n
\nHaemophilia<\/p>\n
\nThe inheritance of sex linked genes controlling sex linked characters is called sex linkage or sex linked inheritance.<\/p>\n
\n<\/p>\n
\n<\/p>\n
\n<\/span><\/strong>
\nSolution 35:<\/strong><\/span><\/p>\n\n
\n