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Chapter-21, , Like Father, Like Daughter, , , , , , Match these column:, A B, Gregor Mendel Not from parents, , , , Polio, , From our, environment, , , , Hair type is, , Experiments with, peas, , , , We learn certain, things, , , , , , acquired from family, , , , Ans, , , A, , B, , , , Gregor Mendel, , Experiments with, peas, , , , Polio, , Not from parents, , , , Hair type is, , acquired from family, , , , We learn certain, things, , , , , , from our, environment

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ee ee ee ee ee, , State whether these statements are true or, false:, 1- We get some traits and habits from our, , family. (True), , 2- We learn certain things and skills from our, environment. (True), , 3- Twins are always exactly, , same. (False), , 4- At times our abilities change because of, some illness or old age. (True), , 5- Having long hair is a trait which runs in, some families. (True)

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Fill in the blanks with correct words:, , 1- The colour of our eyes is inherited from our, parents., , 2- An adopted_ child does not resemble the, people who bring him up., , 3- Identical_ twins look exactly alike., , 4- Legs are affected when a person suffers, from polio., , 5- Gregor Mendel_ explained inherited, characters in pea plants., , 6- Saroja and Suvasini are twins., , 7- Polio is caused by virus.

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Answer these questions:, , Q.1 Whose habits and characters do we take?, Ans- We take habits and characters from our, family., , Q.2 Which part of the body will be affected by, polio? Is this hereditary?, , Ans- One of the leg is affected by polio. This is, not hereditary., , Q.3 What is polio? How can it be prevented?, , Ans- Polio is an infectious disease caused by, poliovirus. In some cases, there is muscle, weakness resulting in an inability to move. It, can be prevented by vaccination.

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Q.4 What is pulse polio?, , Ans- Pulse Polio is an immunisation campaig!, by the government of India to eliminate, poliomyelitis (polio) in India by vaccinating all, children under the age of five years against, the polio virus., , Q.5 Name two characteristics that a person, inherits., , Ans- Following are two characteristics that a, person inherits:, , (a) Height, , (b) Colour of hairs, , Q.6 Why do Saroja and Suvasini behave, differently inspite of being identical twins?, Ans- Saroja and Suvanini behave differently, inspite of being identical twins because they, are being brought up in different environment: