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Questions
Differentiate between the following:
Homozygous and Heterozygous
Differentiate between homozygous and heterozygous.
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Solution
| Sr. No. | Homozygous | Heterozygous |
| 1. | It is pure for a trait and breeds true, producing homozygous individuals with similar characteristics. | A heterozygous individual is usually pure and generates offspring with diverse genotypes on selfing, such as TT, Tt, and tt on selfing of Tt individuals. |
| 2. | Both alleles of a trait, such as TT and tt, are similar. | It carries different alleles, such as Tt. |
| 3. | Homozygous individuals can carry either dominant or recessive alleles, but not both. | A heterozygous individual carries both dominant and recessive alleles. |
| 4. | It produces one type of gamete. | It creates two types of gametes. |
| 5. | It does not display excessive vigour. | Individuals can exhibit hybrid vigour, often known as heterosis. |
RELATED QUESTIONS
Differentiate between the following:
Dominance and Recessive
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Monohybrid and Dihybrid
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In a cross between red coloured and white coloured flowers, when plants with red coloured flowers of F1 generation were self pollinated, plants of F2 generation were obtained in which 75% of plants were with red flowers and 2.5% plants were with white flowers.
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Assertion (A): In humans, if gene (B) is responsible for black eyes and gene (b) responsible for brown eyes, then the colour of eyes of the progeny having gene combination Bb, bb or BB will be black only.
Reason (R): The black colour of the eyes is a dominant trait.
Monohybrid crosses are useful in demonstrating which of the following laws of inheritance suggested by Mendel?
Which pure-breeding pea plants did Mendel select for plant height?
What is the genotype of the pure tall plant selected in the experimental sequence?
What is the genotype of the pure dwarf plant selected in the experimental sequence?
What are the phenotype and genotype of all offspring produced by \[TT \times tt\]?
In the first filial generation, what is the observation for the cross \[TT \times tt\]?
Which gametes are produced by each \[Tt\] plant during selfing in F1?
What are the four genotypic outcomes of the cross \[Tt \times Tt\]?
Which conclusion follows from the tall and dwarf pea plant monohybrid cross?
