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प्रश्न
What is a gene? How is it related to heredity?
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उत्तर
Genes are hereditary units located on a chromosomal thread. A gene can be defined as the “ultimate unit of recombination, mutation, and self-reproduction”. They are responsible for various characteristics externally shown by the plants and animals. A single gene may affect one or more characteristics of offsprings.
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संबंधित प्रश्न
The phenotypic ratio of incomplete dominance is ______.
Give the significance of mutation.
Explain the Term Crossing-over.
Explain the Term Heterosome.
Complete the following sentence with appropriate word:
In mammals, the female is homozygous while the male is _________.
Complete the following sentence with appropriate word:
The small differences among individuals are called ________.
Complete the following sentence with appropriate word:
Upon _______the diploid condition is restored.
Write the functional activity of the following structure:
Genes
Multiple Choice Question
A cross was made between tall and dwarf plants. In F1 generation all plants were tall, when the F1 plants were selfed, the tall and dwarf plants appeared in a 3 : 1 ratio in the F2 generation. This phenomenon is known as:
Multiple choice question.
In a dihybrid cross, F2 generation offsprings show four different phenotypes while the genotypes are _______.
Multiple choice question.
A cross between an individual with an unknown genotype for a trait with recessive plant for that trait is _______.
Identify the possible genotypic ratio in F2 generation if a plant producing red flowers (RR) is crossed with another plant of the same species that produces white flower (rr).
A normal visioned woman whose father is colourblind married a normal visioned man. What are the probabilities of her sons or daughters to be colourblind? Explain with the help of Punnett square.
Define Alleles.
An indvidual of genotype, Aa Bb Cc Dd is used in test cross. How many different phenotypes can appear in this progeny?
Mendel was successful in his experiments because:
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
Define the following term:
Gene
