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प्रश्न
Long answer type question.
Define test cross and explain its significance.
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उत्तर
Definition:
The cross between F1 hybrid and its homozygous recessive parent is called a test cross.
Significance of test cross:
- It helps to determine whether individuals exhibiting dominant character are genotypically homozygous or heterozygous.
- It has wide application in plant breeding experiments.
- In rapid crop improvement programmes, test cross is used to introduce a useful recessive trait in the hybrids.
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संबंधित प्रश्न
What is a test cross?
Explain the statement of
Test cross is back cross but back cross is not necessarily a test cross.
Define the following term:
Dihybrid cross
Read the following case and select the correct option.
ln a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring.
Therefore, it can be concluded that;
An individual produced during a cross between two pure plants differing in two pairs of contrasting characters is always ______
In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?
Statement I - Back cross is the crossing of F1 - hybrid with one of the two parents from which they were derived.
Statement II - Test cross involves the crossing of F1 - hybrid with its homozygous recessive parent.
In light of above statements, choose the correct answer from the option given below.
When a test cross produces all offspring with the dominant phenotype, what can be concluded about the dominant parent's genotype?
In a back cross between F₁ (Tt) and the homozygous recessive parent (tt), what phenotypic ratio is observed?
Based on test cross principles, if a tall plant consistently produces dwarf offspring when crossed with homozygous dwarf plants, what is the tall plant's genotype?
