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प्रश्न
Define the following:
Test cross
Define a test-cross.
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उत्तर १
Test cross is a cross between an organism with an unknown genotype and a recessive parent. It is used to determine whether the individual is homozygous or heterozygous for a trait.
उत्तर २
Crossing of an F1 individual having a dominant phenotype with its homozygous recessive parent is called a test cross. A test cross is performed to determine the genotype of the F2 plant. In a typical test, a cross, an organism showing a dominant phenotype and whose genotype is to be determined is crossed with one that is homozygous recessive for the allele being investigated, instead of self-crossing.
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संबंधित प्रश्न
Define Linkage.
How many linkage groups do occur in human being?
Differentiate between complete and incomplete linkage.
When a white eye Drosophila male (Xr Y) is crossed to a red eye female (XR XR), in the F2 generation all the females are red eyed and 50% males are white eyed. In a criss-cross test, when males are white eyed. In a criss-cross test, when a white eyed female (Xr Xr) is crossed to a red eye male (XRY), the F1 generation offspring had white eyed males while the female offspring bad red eyes. Instead of crossing of a white eyed female (Xr Xr} to a red eyed male (XRY), white eye female (XrXr) to white eye male (XrY) is crossed, the F1 generation will have the following phenotypes and genotype.
From the following disorders identify the ODD one.
The contrasting pairs of factors in Mendelian crosses are called ______.
Crossing over in diploid organism is responsible for ______.
What is true about the crossing over between linked genes?
Which of the following statement is correct?
T. H. Morgan used ______ for his experiments in linkage.
