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प्रश्न
Two heterozygous parents are crossed. If the two loci are linked, what would be the distribution of phenotypic features in the F1 generation for a dihybrid cross?
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उत्तर
Linkage is defined as the coexistence of two or more genes in the same chromosome. Linked genes are inherited together if they are on the same chromosome and close to each other.
For example, a cross between a yellow-bodied and white-eyed and wild-type parent in a Drosophila will produce wild-type and yellow-white progenies. It is because yellow-bodied and white-eyed genes are linked. Consequently, progenies inherit both traits simultaneously.
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संबंधित प्रश्न
Filling the blank based on the given relationship.
3 : 1 Monohybrid : : 9 : 3 : 3 : 1 : ______
Explain Mendel’s dihybrid ratio with the help of any one cross.
A homozygous Tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white flowers (r):
(1) Give the Genotype and Phenotype of the F2 generation.
(2) Give the possible combinations of the gametes that can be obtained from the F2 hybrid.
(3) Give the dihybrid ratio and the phenotype of the offsprings of the F2 generation when two plants of the F1 generation above are crossed.
Complete the following sentence with appropriate word:
_______ is the ratio of dihybrid cross.
Explain with an example the inheritance of the dihybrid cross. How is it different from monohybrid cross?
Under which conditions does the law of independent assortment hold good and why?
Test cross involves
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seed pant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in the F1 generation?
Select the correct statement from the ones given below with respect to dihydrid cross
Among the following characters which one was not considered by Mendel in his experimentation pea?
What is back cross?
Explain the law of dominance in a monohybrid cross.
Identify the statementls that is/are NOT the correct reason/s for Mendel's success in his hybridization experiments.
i. Each factor controlled the single trait and is located on separate chromosomes.
ii. In the pea plant, contrasting characters can be easily recognized.
iii. Mendel carefully recorded the number of plants of each type and expressed his results as ratios.
iv. Mendel performed biochemical assays for identifying the position of 'factors' on chromosome.
Findings of Gregor Mendel were rediscovered by the following scientists EXCEPT for ______
A dihybrid condition is ______.
Mendel’s last law is ______.
The process of mating between closely related individuals is ______.
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are ______.
Each gamete carry ______.
Given below is a dihybrid cross performed on Drosophila.
Which of the following conclusions can be drawn on the basis of this cross? When yellow bodied (y), white-eyed (w) Drosophila females were hybridized with brown bodied (y+), red-eyed males (w+) and F1 progenies were intercrossed, F2 generation would have shown the following ratio:
What is the difference between genetic drift and change due to natural selection?
Independent assortment means:
In the Mendelian dihybrid cross when heterozygous round yellow is self grossed, round green offsprings are represented by the genotype.
