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प्रश्न
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.
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उत्तर
Test cross helps to find out whether the given tall garden pea plant is homozygous or heterzygous.
When a progeny of F1, is crossed with the homozygous recessive parent, it is called test Cross.
Test cross between pure dominant (A) and hybrid dominant (B) individuals with recessive parent is shown below :
Such a cross is useful to determine the genotype of an unknown trait, i.e., whether it is heterozygous or homozygous dominant for the trait.
APPEARS IN
संबंधित प्रश्न
Mention whether the cross is a monohybrid or dihybrid.
A certain couple got four daughters in a sequence and no son. Does it mean that the husband does not produce Y-chromosome bearing sperms? Explain. What is the chance of this couple having a daughter?
Name the conditions when both the alleles are identical?
What do you understand by the terms phenotype and genotype?
A pure tall plant (TT) is crossed with the pure dwarf plant (tt), what would be the F1 and F2 generations? Explain.
Cross between hybrid and recessive parent:
Pooja has green eyes while her parents and brother have black eyes. Pooja’s husband Ravi has black eyes while his mother has green eyes and father has black eyes.
a. On the basis of the above given information, is the green eye colour a dominant or recessive trait? Justify your answer
b. What is the possible genetic makeup of Pooja’s brother’s eye colour?
c. What is the probability that the offspring of Pooja and Ravi will have green eyes? Also, show the inheritance of eye colour in the offspring with the help of a suitable cross.
OR
c. 50% of the offspring of Pooja’s brother are green eyed. With help of cross show how this is possible.
Mendel used a monohybrid cross to understand how which feature passes from parents to offspring?
What are the four genotypic outcomes of the cross \[Tt \times Tt\]?
What is the genotypic ratio in F2?
