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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
Two heterozygous parents (i.e., GgLl and GgLl) are crossed, and the two loci are linked; then the cross will be:
This means, if ‘G’ represents a grey body (dominant), ‘g’ a black body (recessive), ‘L’ long (dominant) and ‘l’ dwarf (recessive), then the distribution of phenotypic features in the F1 generation will be 3 : 1, i.e., `3/4` will show the dominant feature, grey and long, either in a homozygous (GGLL) or in a heterozygous (GgLl) condition and `1/4` will show the recessive feature, black and dwarf (ggll).
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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.
State Mendel’s law of Independent Assortment.
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.
Multiple Choice Question
When two individuals differing in at least one character are crossed, the process is known as:
Under which conditions does the law of independent assortment hold good and why?
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
Select the period for Mendel’s hybridization experiments
Among the following characters which one was not considered by Mendel in his experimentation pea?
What is back cross?
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates ______.
A normal green male maize is crossed with albino female. The progeny is albino because ______.
A dihybrid condition is ______.
Mendel’s last law is ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Assertion: When the two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations is much higher than the nonparental type.
Reason: Higher parental gene combinations can be attributed to crossing over between two genes.
From the list given below, select the character which can be acquired but not inherited
How is the sex of a newborn determined in humans?
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
Give a reason why only tall plants are observed in F1 progeny.
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
When F1 plants were self-pollinated, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F2 generation.
Which of the following statement is not correct for two genes that show 50% recombination frequency?
When two hybrids rrTt and Rrtt are gassed, the phenotype ratio of offspring should be:
Which scientist is known as the Father of Genetics for establishing fundamental principles of heredity through experiments on pea plants?
What is the first step in Mendel's experimental sequence for studying heredity?
In what year was Mendel's work independently rediscovered by multiple scientists?
