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519 questions in this collection · Page 21 of 52
Question 201 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
In the context of the Hardy-Weinberg Principle, what does the variable q2 represent?
The Hardy-Weinberg equation is p2 + 2pq + q2 = 1. In this equation, q is the frequency of the recessive allele, and q2 is the frequency of the homozygous recessive genotype.
Question 202 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
The subject that deals with the inheritance, as well as the variation of characters from parents to offspring, is known as _______.
Genetics is the branch of biology that deals with the inheritance, as well as the variation of characters from parents to offspring.
Question 203 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
Inheritance is the process by which characters are passed on from parent to progeny; it is the basis of _______.
Inheritance is the process by which characters are passed on from parent to progeny; it is the basis of heredity.
Question 204 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
Mendel investigated characters in the garden pea plant that were manifested as two opposing traits, such as tall or dwarf plants, or yellow or _______ seeds.
Mendel investigated characters in the garden pea plant that were manifested as two opposing traits, e.g., tall or dwarf plants, yellow or green seeds.
Question 205 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
A true-breeding line is one that, having undergone continuous self-pollination, shows the stable trait inheritance and expression for several _______.
A true-breeding line is one that, having undergone continuous self-pollination, shows the stable trait inheritance and expression for several generations.
Question 206 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
In Mendel's monohybrid cross between tall and dwarf pea plants, all plants of the first hybrid generation ($F_1$ progeny) were _______.
Mendel observed that all the F1 progeny plants were tall, like one of its parents; none were dwarf.
Question 207 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
In the F2 generation of a monohybrid cross, the dwarf character, which was not seen in the F1 generation, was expressed in the proportion of _______ of the F2 plants.
The proportion of plants that were dwarf were 1/4th of the F2 plants while 3/4th of the F2 plants were tall.
Question 208 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
Genes which code for a pair of contrasting traits are known as _______, which are slightly different forms of the same gene.
Genes which code for a pair of contrasting traits are known as alleles, i.e., they are slightly different forms of the same gene.
Question 209 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
The allelic pair of genes for height in a true breeding tall or dwarf pea variety are considered identical or _______, such as TT and tt.
In a true breeding, tall or dwarf pea variety the allelic pair of genes for height are identical or homozygous, TT and tt, respectively.
Question 210 of 519
📘 CLASS XII
Principles Of Inheritance And Variation
The descriptive terms, such as tall and dwarf, used to describe the appearance of a plant are called the _______.
TT and tt are called the genotype of the plant while the descriptive terms tall and dwarf are the phenotype.