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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
What is a dihybrid cross? How did Mendel perform this cross?
State Mendel’s law of Independent Assortment.
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents
In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates
Among the following characters which one was not considered by Mendel in his experimentation pea?
Name the seven contrasting traits of Mendel.
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.
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates ______.
Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between ++ /++ × ab/ab shall show gametes ______.
A fruit fly exhibiting both male and female traits is ______.
Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are ______.
Each gamete carry ______.
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.
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:
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.
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 cross-pollinated with plants having tt genes, 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.
When two hybrids rrTt and Rrtt are gassed, the phenotype ratio of offspring should be:
In the Mendelian dihybrid cross when heterozygous round yellow is self grossed, round green offsprings are represented by the genotype.
The Law of independent assortment is applicable for the traits which ______
Mendel's law of independent assortment is based on F2 ratio of:
Which scientist is known as the Father of Genetics for establishing fundamental principles of heredity through experiments on pea plants?
What was Gregor Mendel's birthplace?
What institution did Gregor Mendel attend to study science and mathematics?
Which aspect of Mendel's work was particularly difficult for the scientific community to accept during his lifetime?
What does Mendel's approach to counting and analyzing offspring demonstrate about the scientific method?
