Mendel Law Of Heritence — Agri Master Mind
Mendel's laws were rediscovered in which of the following years ?
- 1890
- 1900
- 1905
- 1898
Gregor Johann Mendel is regarded as father of which of the following?
- Plant breeding
- Genetics
- Botany
- Cytogenetics
Mendel's laws were rediscovered in which of the following years ?
- 1890
- 1900
- 1905
- 1898
Who wrote the classical book 'Problems in Genetics'?
- C. Stern
- W. Bateson
- Hugo de Vries
- W.L. Johannsen
Which of the following scientists introduced the terms genotype and phenotype?
- W.L. Johannsen
- W. Bateson
- G.J. Mendel
- R.C. Punnett
How many different types of gametes are produced by an individual having the genotype Aa Bb CC Dd Ee?
- 8
- 4
- 16
- 32
Which of the following is the reason for Mendel's success ?
- Initially, Mendel studied the inheritance of only one pair of contrasting characters at a time.
- He analysed the reasons for the failure of previous workers.
- Mendel was lucky..
- All of the above
The explanation of 3: 1 ratio, according to the law of segregation, is based on which of the following assumptions?.
- Production of two types of gametes in equal frequencies in F_{1}
- Equal survival of the different gametes.
- Random union of male and female gametes and equal survival of the different zygotes.
- All of the above
Which of the following terms was coined by W. Bateson?
- Allelomorph
- Homozygote
- Heterozygote
- All of the above
Which of the following scientists independently rediscovered the Mendel's laws?
- Hugo de Vries, W. Bateson and R.C. Punnett.
- Carl Correns, T.H. Morgan and H.J. Muller
- Eric von Tschermak, Joseph Koelreuter and Charles Darwin.
- Hugo de Vries, Carl Correns and Eric von Tschermak.
Who gave the term genetics?
- W.L. Johannsen
- W. Bateson
- R.C. Punnett
- G.J. Mendel
Why Mendel selected pea for his study?
- Due to larger size of flower.
- Due to short span of life-cycle.
- Due to self-pollinated nature of the crop.
- All of the above
How many characters were studied by Mendel in garden pea ?
- 7
- 14
- 5
- 10
Who of the following proposed that Mendel's 'factor' be called 'gene'?
- W. Bateson
- R.C. Punnett
- W.L. Johannsen
- Hugo de Vries
An F_{2} of a trihybrid cross will give which of the following phenotypic ratios ?
- 9:3:3:1
- 1:46:4:1
- 27:9:9:9:3:3:3:1
- 27:9:9:3:3:1
In a trihybrid cross, what will be the minimum size of a perfect F_{2} population?
- 64
- 27
- 16
- 81
In case of incomplete dominance, how many different phenotypes will be observed in F_{2} if 4 pairs of alleles were segregating?
- 27
- 64
- 81
- 256
An F_{1} hybrid with the genotype Aa Bb Cc Dd will produce how many different types of gametes?
- 16
- 32
- 64
- 8
Which of the following describes the Mendel's concept of gene?
- The development of each character is controlled by a gene and each gene exists in two alternative forms called alleles.
- Two alleles of a gene do not modify the effect of each other when they exist together in the same cell.
- Each somatic cell has two copies of a gene and alleles of a gene separate and pass into different gametes of the hybrid.
- All of the above
The chromosomal theory of inheritance was proposed by which of the following?
- Morgan and Morgan
- Morgan and Sturtevent
- Sutton and Bovery
- Bateson and Punnett
A family has four children. What is the probability that there are 2 girls and 2 boys?
- 6/16
- 4/16
- 1/16
- 5/16
During 1901, who suggested that during meiosis homologous chromosomes are paired side by side ?
- Winiwarter
- Correns
- Montogemery
- Cannon
Which of the following describes segregation?
- Two alleles of a gene separate during gamete formation to yield two types of gametes in 1: 1 ratio.
- Production of 1:2:1 genotypic ratío
- Production of 3: 1 phenotypic ratio in F_{2} F_{2}
- Production of 1:2:1 genotypic and 3: 1 phenotypic ratios in F_{2}
Which of the following is correct about dominance? I. Generally the allele encoding functional molecule is dominant. II. In some cases, the allele encoding the non-functional molecule is dominant. III. It describes relationships between alleles of the same gene.
- I, II, III
- II, III
- I, III
- I, II
Due to which of the following phenomenon, recessive trait appear/express in F_{1} ?
- Dominance
- Pseudo-dominance
- Codominance
- Epistasis
Reappearance of the ancestral form of a trait after one or more generations is called which of the following?
- Mutation
- Epistasis
- Paramutation
- Atavism
Nucellus of ovules contains which of the following?
- Haploid (n) chromosome number
- Diploid (2n) chromosome number
- Triploid (3n) chromosome number
- Both (a) and (b)
Which of the following is the group of selfed progeny of a single self-fertilizing, homozygous plant ?
- Clone
- Inbred
- Pureline
- Hybrid
Which of the following is not correct about gene ?
- It is a segment of DNA.
- It encodes an RNA or a polypeptide which has structural, regulatory enzymatic or hormonal function.
- It is responsible for the development of the, characters of an organism.
- It is located in nucleus only.
An F_{2} of a dihybrid cross will yield 9 different genotypes in which of the following ratios ?
- 1:2:1:4:4:1:1:1:1
- 1:2:1:2:4:2:1:2:1
- 1:3:2:2:1:2:2:1
- 2:1:4:1:4:1:1:1
A normal girl married a normal male. Out of their four children, one child had a recessive genetic disease. What are the genotypes of the two parents for gene a, which is responsible for this diseases ?
- AA, Aa
- Aa, aa
- AA, aa
- Aa, Aa