Heredity

Selfing of the F1 monohybrids resulted in tall and dwarf plants respectively in the ratio of
1. 1:2
2. 3:1
3. 1:3
4. none of these
The actual number of tall and dwarf plants obtained by Mendel was
1. 700 tall and 250 dwarf
2. 878 tall and 725 dwarf
3. 787 tall and 277 dwarf
4. none of these
Dihybrid cross involves the inheritance of ______ of contrasting characteristics (or contrasting traits) at the same time.
1. one-pair
2. two-pairs
3. three-pairs
4. none of these
The ratio of each phenotype (or appearance) of seeds in the F2 generation is
1. 9:3:3:1
2. 3:9:1:3
3. 1:3:3:9
4. none of these
In wich year T.H. Morgan was awarded Nobel Prize for determining the role of chromosomes in heredity?
1. 1999
2. 1997
3. 1993
4. none of these
Which type of cromosomes have v shape?
1. Telocentric
2. Acrocentric
3. Submetacentric
4. Submetacentric
In human, each cell normally contains_____ pairs of chromosomes.
1. 22
2. 23
3. 24
4. None of these
The loss of one or more chromosome in a ploidy is called
1. Aneuploidy
2. Tetraploidy
3. Euploidy
4. polyploidy
The short segments of DNA are called
1. DNA ligase
2. lagging strand
3. Okazaki fragments
4. none of these
The ______ units form the backbone of the DNA.
1. 5 carbon sugar
2. Phosphate
3. Nitrogenous bases
4. Sugar phosphate
Who is father of genetics?
1. Gregor Johann Mendel
2. Waldeyer
3. James Watson
4. Francis Crick
Dominant character of seed color of pea plant is
1. green
2. red
3. yellow
4. none of these
recessive character of seed-coat color of pea plant is
1. green
2. white
3. yellow
4. none of these
naturally self-pollinating palnt is
1. pea plant
2. neem
3. hibiscus plant
4. none of thses
Which of the following is type of the F2 generation ?
1. Tall Homozygous
2. Tall Heterozygous
3. Dwarf Homozygous
4. all of these
genotypic ratio is
1. 1:1:2
2. 1:2:1
3. 2:1:1
4. none of these
The term ‘chromosomes’ was first coined by
1. Waldeyer
2. James Watson
3. Francis
4. none of these
Each chromatid is made up of spirally coiled thin structure called
1. Telocentric
2. Karyotype
3. chromonema
4. None of these
The chromosomes are made up of
1. DNA
2. DNA,RNA
3. RNA
4. none of these
In Metacentric, what is the shape of chromosomes?
1. L
2. J
3. V
4. none of these
DNA molecule consists of ___ polynucleotide chains.
1. Two
2. Three
3. Four
4. none of these
Okasaki fragments are joined together by
1. DNA polymerase
2. DNA ligase
3. RNA primer
4. Helicase
DNA consists of two ____chains
1. DNA polymerase
2. diploid
3. polynucleotide
4. none of these
the daughter strand is synthesized as a continuous strand which is called
1. lagging strand
2. leading strand
3. Okazaki fragments
4. none of these
The term mutation was introduced by
1. Hugo De Vries
2. Chargaff
3. Waldeyer
4. none of these
The enzyme called ____, bind to the origin of replication site
1. ligase
2. topoisomerase
3. helicase
4. none of these
Sex is determined by the ____ of an individual
1. chromosomes
2. helicase
3. topoisomerase
4. none of these
If an individual has three haploid sets of chromosomes, the condition is called
1. tetraploidy
2. diploid
3. triploidy
4. none of these
If it has four haploid sets of chromosomes, the condition is called
1. tetraploidy
2. diploid
3. triploidy
4. none of these

Heredity

Quiz