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प्रश्न
State whether the following statement is true or false :
The sex of an infant is not a case of inheritance of characteristics.
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उत्तर
False. The sex of an infant is a case of inheritance of characteristics. This is because an infant's sex is determined by the sex chromosomes that come from parents.
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संबंधित प्रश्न
Name the information source for making proteins in the cells.
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?
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:
What constitutes the link between one generation and the next?
Name the first scientist who studied the inheritance of traits from one generation to the next.
Fill in the following blank with suitable word .
In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
Using height (tallness/dwarfness) of a plant as an example, show that genes control the characteristics or traits in an organism.
State Mendel's second law of inheritance.
When two parents are crossed, the offspring are referred to as :
recessives
test cross
F1 generation
F2 generation
For his experiments on heredity, Mendel used :
papaya plants
potato plants
pea plants
pear plants
If the ratio of each phenotype of the seeds of pea plants in the F2 generation is 9 : 3 : 3 : 1, it is known as :
(a) tetrahybrid ratio
(b) monohybrid ratio
(c) dihybrid ratio
(d) trihybrid ratio
A red-haired woman marries a brown-haired man, and all the children are brown haired. Explain this genetically.
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?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
What is genetics?
____________ refers to the transmission of genetic information from parental generation to next generation.
Assertion: When pure breed tall plants are crossed with pure breed short plants, all the plants in F1 progeny are tall. When the tall plants of F1 progeny are crossed, short plants re-appear in F2 progeny.
Reason: Traits are independently inherited.
In the following figure showing a germinating gram seed, name the parts labelled as A, B and C:
Why is Part 'B' considered to be important during germination?
