STANDARD TENPART I & IICHAPTER : 9Heredity and Evolution /15 0 votes, 0 avg 929 SCIENCE AND TECHNOLOGY – Chapter 9 Heredity and Evolution 1 / 15 Which of the following pair of organ is not homologous? Forelimbs in humans and lizard Forelimbs in lizard and frog Wings in butterfly and bat None of these 2 / 15 The organs present in two organisms indicate that they are derived from the same ancestor are: Analogous Organs Respiratory Organs Sense organs Homologous Organs 3 / 15 What is the ancient name for all human beings? Monkey Chimpanzee Homo sapiens Invertebrates 4 / 15 What could be the reason for the fossil of an organism to be found in the deeper layers of the earth? The extinction of organism has occurred few years back The extinction of organism has occurred thousands of years ago The position of fossil in the layers of earth is not related to its time of extinction Time of extinction cannot be determined. 5 / 15 Which is the one characteristic of the parents that can be inherited by their children? Deep scar on chin Snub nose Technique of swimming Cut nose 6 / 15 Which of the following determines the sex of a child? The length of the mother’s pregnancy The length of time between ovulation and copulation The presence of an X chromosome in an ovum The presence of a Y chromosome in a sperm 7 / 15 In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are:(i) Large chromosome(ii) Small chromosome(iii) Y chromosome(iv) X chromosome (i) and (ii) (iii) and (ii) (iii) and (iv) (ii) and (iv) 8 / 15 In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be: 1 : 3 3 : 1 1 : 1 2 : 1 9 / 15 A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants as: Tallness is the dominant trait Shortness is the dominant trait Tallness is the recessive trait Height of plant is not governed by gene t or t 10 / 15 The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds.Dominants traitRecessive traitNo. of F2 offspringRound seedsWrinkled seeds7524From these results, it can be concluded that the actual number of round seeds he obtained was: 1881 22572 2508 5643 11 / 15 What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of plant contain 28 chromosomes in all? 56 28 14 4 12 / 15 A pregnant woman has an equal chance of her baby being blood group A or blood group AB. Which one of the following shows the possible genotypes of the woman and the father of her child? IA IA and IB IO IA IB and IB IO IA IO and IB IO IO IB and IA IO 13 / 15 In the human blood grouping, the four basic blood types are type A, type B, type AB, and type O. They are: Simple dominant and recessive traits Co-dominant traits Recessive traits Inherited traits 14 / 15 If a normal cell of human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be: 60 23 22 40 15 / 15 The sequence of gradual changes which takes place in the primitive organisms over millions of years in which new species are produced is known as Evolution Heredity Generation Inheritance Your score is 0% Restart quiz