Heredity and evolution Worksheet-15
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What is Mendel's genetics?
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What is inherited trait?
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Do offsprings and their parents have the same traits?
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What type of reproduction give rise to more number of successful variation?
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What is the basis of evolution?
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What is gene flow?
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Define hierarchy.
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Define characteristic of organisms.
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What is classification?
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What are the various kinds of fossils?
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What is adaptation?
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What is phylogeny?
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What is environmental selection?
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What is acquired trait?
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Define speciation.
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What is artificial selection?
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What is the main reason for evolution according to Darwin?
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What gave rise to life originally?
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What is the basic unit of life?
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What is the basic characteristic difference of cell design?
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'Older fossils are found closer to the surface' - True or false.
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What is the sex chromosome pair of male?
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What is the sex chromosome pair of female?
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What will be the sex of a child who inherits X chromosome from his/her father?
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What will be the sex of a child who inherit Y chromosome from his/her father?
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State which of the following are homologous and which are analogous -
(a) Wings of bird and an insect
(b) Forelimbs of frog, a reptile, a bird and a human.
(c) Flippers of whale and fins of fish
(d) Tail of chameleon and hand of man
(e) Flippers of whale and wings of bat.
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If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
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A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits - blood group A or O - is dominant? Why or why not?
Answer:
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Mendel’s genetics deals with the genes passing on to generations.
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Inherited traits is the transmission of particular characteristics from parents to their offsprings, generation to generation, which bear all basic features with great deal of variation. Inherited trait is therefore, a particular genetically determined characteristics that distinguishes a person.
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Yes.
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Sexual reproduction.
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Selection of variants by environmental factors forms the basis of evolution.
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Gene flow is the exchange of genetic material by interbreeding between populations of the same species or between individuals within a population. Gene flow increases the variation in the genetic composition of a population.
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Hierarchy is a type of social organisation in which individuals are ranked according to their status or dominance relative to other group members. Higher up in the hierarchy the similarities between members of a group become fewer.
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Characteristic is the detailed appearance or behaviour of a particular form or a particular function. For example, the four limbs of human beings is a characteristic and that plants can perform photosynthesis is also a characteristic.
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Classification is the arrangement of organisms into a series of groups based on physiological, biochemical, anatomical or other relationships.
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Kinds of Fossils fossils are of various kinds depending upon their differences in appearances and degrees of detail and preservation. They are - Fossil tree trunk, Fossil invertebrate (Ammonite), Fossil invertebrate (Trilobite) Fossil fish (Knightia) and Fossil dinosaur skull (Rajasaurus).
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Adaptation is any change in the structure or functioning of an organism that makes it better suited to its environment.
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Phylogeny is the evolutionary history of an organism or group of related organisms.
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Environmental selection is the selection within a population resulting from the influence exerted by the environment. It leads to a change in the composition of genes within a population.
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Acquired Trait is a particular characteristic that is developed during the lifetime of an individual. Such characteristics are not genetically controlled and cannot be passed on to the next generation.
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Speciation is the evolution of reproductive isolation among once - interbreeding populations, i.e., the development of one or more species from an existing species.
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Artificial selection is the modification of species by selective breeding. Animals or plants with desirable characteristics or traits are interbred with the aim to produce new strain of organisms for a specific purpose.
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According to Darwin evolution took place due to natural selection.
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Life must have developed from the simple inorganic molecules which were present on earth after it was formed.
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Cell is the basic unit of life in all organisms.
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The basic characteristic of cell design that differs among different organisms is whether the cell has a nucleus. Bacterial cells do not, while the cells of most other organisms do.
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False.
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The sex chromosome pair of male has one X chromosome and one Y chromosome i.e., half of the male gametes or sperms will have X chromosome and the other half will have Y chromosome.
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The sex chromosome pair of female has two X chromosome i.e., all the female gametes or ova will have only X chromosomes.
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The sex of the child will be a boy.
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(a) Analogous, (b) Homologous, (c) Analogous, (d) Analogous, (e) Homologous.
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If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, trait B is likely to have arisen earlier.
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Why are traits acquired during the life-time of an individual not inherited?