Inheritance of Two Genes
Inheritance of Two Genes: Overview
This topic covers concepts, such as Dihybrid Cross, Law of Independent Assortment, Chromosomal Theory of Inheritance, Sex Linked Inheritance in Drosophila, Linkage, Crossing Over, and Recombination of Genes.
Important Questions on Inheritance of Two Genes
A homozygous tall pea plant with yellow seeds is crossed with a dwarf pea plant with green seeds. The phenotypic ratio of its F2 plants is 9:3:3:1. It is representing:
The number of offspring produced in F2 generation of dihybrid cross is 1600. Find the number of F2 offsprings with double dominant phenotype?
Cytological observation made in a many number of ______ led to the development of the concept of genetic/chromosomal basis of sex determination
Find out the incorrect statement.
Match the following.
| Column I | Column II | ||
| (a) | T. H. Morgan | (i) | Chromosome theory |
| (b) | Hugo de Vries | (ii) | Gene mapping |
| (c) | Sutton and Boveri | (iii) | Linkage |
| (d) | Alfred Sturtevant | (iv) | Mutation |
| (v) | Hybrid experiments |
A cross wạs carried out between two individuals, heterozygous for two pairs of genes. Assuming segregation and independent assortment, the number of different genotypes and phenotypes obtained respectively would be
Match the following:
| List - I | List - II | ||
| (A) | Sutton and Boveri | (I) | Identification of Auxins |
| (B) | F.W. Went | (II) | Artificial synthesis of the gene |
| (C) | Hargovind Khorana | (III) | Role of chromosome in heredity |
| (D) | V.S. Rama Das | (IV) | Discovery of zymase |
| (V) | Contribution in photosynthesis | ||
The correct match is
Match the following lists:
| List I | List II | ||
| a | Ramanujam | i | De Historia Plantarum |
| b | Sutton and Boveri | ii | Palynology |
| c | Theophrastus | iii | Sexual system of classification |
| d | Carolus Von Linnaeus | iv | Sexual reproduction in plants |
| v | Chromosome theory of inheritance |
In Drosophila, the genes for the body color and eye color are present on:
Female is crossed with the male gametes shall be:
The two genes are apart. Then the frequency of recombination is:
In an experiment of Morgan in Drosophila for eye colour and wing size. What percentage of linkage was observed in F2 generation?
A pea plant with yellow and round seeds crossed with another pea plant with green and wrinkled seeds produced yellow round seeds and yellow wrinkled seeds. Genotype of plant with yellow and round seeds must be _____.
The Law of independent assortment was proved by
A scientist was awarded the Nobel prize for his genetic studies on the linear arrangement of genes on the chromosome in the fruit fly, Drosophila melanogaster. Who is this scientist?
"When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters".
Which of Mendel's laws/principles explains the above statement?
The figure shows experiment of T.H. Morgan on linkage. If in cross-I, genes are tightly linked and in cross-II, genes are loosely linked then what will be the percentage of recombination produced in cross-I and cross-II respectively?
The Punnett square shown below represents the pattern of inheritance in a dihybrid cross, where Round (R) is dominant over Wrinkled (r) seeds and Yellow (Y) is dominant over Green (y) seeds.
Find out the odd one.
Where did the sepoys first refuse to use the greased cartridges, sparking the 1857 revolt?
Who led the revolt in Kanpur during the 1857 uprising?
