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प्रश्न
Assertion (A): In humans, if gene (B) is responsible for black eyes and gene (b) responsible for brown eyes, then the colour of eyes of the progeny having gene combination Bb, bb or BB will be black only.
Reason (R): The black colour of the eyes is a dominant trait.
विकल्प
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
उत्तर
(A) is false, but (R) is true.
Explanation:
Brown eyes will result from the bb combination. Due to the dominance of the trait Black eyes (B).
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संबंधित प्रश्न
Differentiate between the following -
Monohybrid and Dihybrid.
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.
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.
Differentiate Between Monohybrid and Dihybrid cross.
Name the conditions when both the alleles are identical?
What do you understand by the terms phenotype and genotype?
Differentiate between inherited and acquired characters. Give one example for each type.
A Monohybrid cross is ______
Punnett square is used to know
In a cross between red coloured and white coloured flowers, when plants with red coloured flowers of F1 generation were self pollinated, plants of F2 generation were obtained in which 75% of plants were with red flowers and 2.5% plants were with white flowers.
Explain the inheritance of traits in the above cross with the help of a flow chart only along with the ratio of plants obtained.
