Biology 10th Class English Medium Chapter 15 Online Test With Answers

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Biology 10th Class English Medium Chapter 15 Online Test

Sr. # Questions Answers Choice
1 Charles Darwin proposed that organisms produce many more offspring than can possible survive on the limited amount of resources available to them. According To Darwin, the offspring that are most likely to survive are those that. Are born first and grow fastest Are largest and most aggressive Have no natural predators Are best adapted to the environment.
2 A purple flowered pea plant has the genotype PP, which of the following statements about this plant is FALSE. Its phenotype will be white flowers . It has a homozygous dominant genotype. When bred to a white flowered plant all offspring will be purple flowered. All the gametes produced will have the same flower colour allele
3 Mendel's primary contribution to our understanding of inheritance was: The idea that genes are found on chromosomes Explanation of the patterns of inheritance The discovery of alleles Determining that informations contained in DNA are for protein synthesis.
4 Which of the following statement regarding genes is FALSE. Genes are located on chromosomes Genes consist of a long sequence of DNA A gen contains information for the production of a protein Each cell contain a single copy of every gene.
5 How many genetically different kinds of gametes an individual with genotype AAbb can produce? 1 2 4 9
6 In the cross-pollination between a true-breeding yellow pod plant and a true-breeding green pod plant, where green pod colour is dominant, the resulting offspring will be. 1/4 green , 3/4 yellow All yelow 1/4 yellow, 3/4 green All green
7 An organism's expressed physical trait, such as seed colour or pod shape is called its. Genotype Phenotype Physical type Karyotype
8 The relationship between the alleles IA and IB of the blood group is: complete dominance incomplete dominance recessiveness co-dominance
9 In dihybrid cross the genotypic ratio of F2 generation is: 1 : 1 ; 1 : 1 1 :3 :1 : 1 1 : 2 : 2 : 1 9 : 3 : 3 : 1
10 ABO blood system is controlled by a gene I The number of alleles I.The number of alleles of this gene are: two three five many
11 The genotype of wrinkled green seeds was: RRyy RyYr RRYY rryy
12 How many contrasting pairs of characters of pea plant were studied bu mendel? one three five seven
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