Advertisements
Advertisements
Question
Give reasons why acquired characters are not inherited.
Solution
Acquired characters are those characters that an organism gets during its lifetime. These characters do not bring any change in the DNA of germ cells so these characters are not inherited. Acquired traits are the changes that occur in non-reproductive tissues, thus they cannot be passed on to DNA of germ cells. Hence, these characters do not produce a change in the genes of germ cells, so they cannot be inherited.
Example : Swimming skills do not have any genetic changes in the individual who knows it. So it cannot pass from one generation to another as genetic code is the only way organisms pass information to the next generation.
APPEARS IN
RELATED QUESTIONS
Differentiate between the following -
Homozygous and Heterozygous
A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.
How would you find out whether a given tall garden pea plant is homozygous or heterzygous? Substantiate your answer with the help fo Punnett squares.
Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.
What is a monohybrid cross? How did Mendel perform this cross?
A garden pea plant produces axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant trait?
A pure tall plant (TT) is crossed with the pure dwarf plant (tt), what would be the F1 and F2 generations? Explain.
Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in the F1 generation are then selfed to produce F2 generation of pea plants.
What do the plants of the F1 generation look like?
Differentiate between inherited and acquired characters. Give one example for each type.
In a plant tallness is dominant over dwarfness and red flower is dominant over white. Starting with the parents work out a dihybrid cross. What is standard dihybrid ratio? Do you think the values would deviate if the two genes in question are interacting with each other?
