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प्रश्न
Mutation alerts the hereditary material. Give reasons.
उत्तर
Mutation alerts the hereditary materiel of an organism's cell and results in a change in certain characters of traits. For example:
(a) Sickle-cell anemia is a blood disease caused by a gene mutation. The mutation causes a change in the DNA which controls the productivity of RBCs.
(b) Radioactive radiations also alter the gene structure and their effects can be seen generation after generation.
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संबंधित प्रश्न
A pure tall plant (TT) is crossed with a pure dwarf plant (tt).
Draw Punnet squares to show
(1) F2 generation
(2) F2 generation.
Give the Phenotypic and Genotypic ratio of the F2 and F2 generation.
Explain the Term Heterosome.
Complete the following sentence with appropriate word:
The dissimilar pairs of genes present in an individual are known as _______________.
Choose the Odd One Out
Multiple Choice Question
When an individual has both the genes of a contrasting character, it is said to be:
Explain a dihybrid cross with suitable example and checker board method.
Which one of the following is back cross?
The word chromosome was coined by
Give any two points of difference between homozygous and heterozygous.
Explain test cross with suitable example and state its ratios.
A recessive factor is altered by the presence of a dominant factor.
Identify the genotype of peacock.
Identify the genotype of a round seeded tall plant which when crossed with a plant of similar genotype produces the following percentage of phenotypes:
(tall round = 56.25 %, tall wrinkled = 18.75 %, dwarf round = 18.75 %, dwarf wrinkled = 6.25 %.)
The percentage of each gamete out of four different types of gametes produced by the F1 dihybrid will be ________.
Two alternative forms of genes or alleles are located on ______.
In which region of chromosomes does crossing over take place?
Name any two genetic diseases in humans.
Rewrite the correct form of the statement by changing the first or last word only:
The full complement of DNA of an organism is termed as genetics.
