HARD
NEET
IMPORTANT
Earn 100

Which of the following is a test cross?
(a)

(b)

(c)

(d)


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Important Questions on Principles of Inheritance and Variation
HARD
NEET
IMPORTANT
Fruit shape in shepherd's purse ( ) is of two types- triangular and top-shaped. Triangular fruit shape (T) is dominant over top-shape (t). Following table summarises the results of several crosses.
Cross | Result |
---|---|
Strain tt | All triangular |
Strain tt | triangular: top-shaped |
Strain tt | All top-shaped |
Strain Tt | triangular: top-shaped |
Which pair of strains possess the genotype Tt?

EASY
NEET
IMPORTANT
Mendel formulated the law of purity of gametes on the basis of

MEDIUM
NEET
IMPORTANT
Read the given statements and select the correct option.
Statement I: The law of segregation is one of the most important contributions to the biology.
Statement II: It introduced the concept of heredity factors as discrete physical entities which do not become blended.

MEDIUM
NEET
IMPORTANT
The inheritance of flower colour in Antirrhinum (dog flower) is an example of ?


MEDIUM
NEET
IMPORTANT
What will be the phenotypic ratio in generation for the inheritance of flower colour be in Antirrhinum (dog flower) ?

MEDIUM
NEET
IMPORTANT
Phenotypic and genotypic ratio is similar in case of

MEDIUM
NEET
IMPORTANT
In four O’clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers?

MEDIUM
NEET
IMPORTANT
Andalusian fowls have two pure forms - black and white. If black forms and white forms are crossed, F1 individuals appear blue coloured , due to incomplete dominance. Which of the following would be an outcome of a cross between black form and blue form?
