NEW
Font size
WorksheetsGenetics & Biotechnology
Total questions: 25
Worksheet time: 25mins
Position of a gene on chromosome is called
Locus
Factor
Cistron
Nucleosome
In a monohybrid cross, the ratio of F2 true breeding dominant and true breeding recessive would be
50:50
25:25
75:25
25:75
In a dihybrid cross, F2 phenotypic ratio is 13:3.It is a case of
Complementary genes
Epistatic genes
Multigenic inheritance
Incomplete dominance
A cross between parent and hybrid is known as
Test cross
Back cross
Monohybrid cross
Reciprocal cross
The law of segregation of gametes is also known as the law of purity of gametes because
Gametes have only one of the two alleles for each character
Gametes cannot be contaminated
Gametes are very different types of cells
It was just another name adopted accidentally
A haploid set of all the genes present in a gamete is called
Genotype
Phenotype
Genome
Linkage group
In Mirabilis jalapa when two pink flowered plants were crossed with each other, the F2 generation produced 40 red, 80 pink and 40 white flowering plants. This is a case of
Duplicate genes
Lethal genes
Incomplete Dominance
Epistasis
The factors which represent the contrasting pairs of characters are called
Dominant and recessive
Alleles
Homologous pairs
Determinants
Mendel observed red flowers in F1 when he crossed red and white because of
Dominance
Recessive gene
Law of Independent Assortment
Law of Segragation
How would you test whether a Pea plant is pure or hybrid for tallness?
Cross it with another tall Pea plant of unknown genotype
Cross it with a homozygous dwarf pea
Cross it with a pure tall pea plant
Cross it with any pea plant
A modified dihybrid mendelian ratio of 9:3:4 indicates
Supplementary genes
Complementary genes
Lethal genes
Epistatic genes
ABO blood grouping shows
Polygenes
Dominant-recessive genes
Codominant genes
Both codominant and dominant recessive genes
Allele is
Segment of gene
Form of a gene
Special kind of gene
A muton
An individual having similar unit factors of a character is
Heterozygote
Homozygote
Dominant
Recessive
Checkerboard method of calculations was developed by
Mendel
Bateson
Punnet
Morgan
Some gene loci on two homologous chromosomes produce different phenotypes. They bear
Homozygous alleles
Heterozygous alleles
Two different genes
Pleiotropic genes
Repeated selfing produces
Heterozygosity
Homozygosity
Homozygosity in some and heterozygosity in other traits
Pure hybrids
A phenotypic ratio not obtained by Mendel was
3:1
1:2:1
1:1:1:1
9:3:3:1
First generation after a cross is
First Filial generation
F1 generation
Second filial generation
Both A and B
The number of genotypes produced by gametes Y and y would be
1
12
3
4
A single heterozygous yellow wrinkled seeded Pea plant shall produce gametes
YR only
yr only
Yr and yr
YR and yR
Genetics deals with
Heredity and variations
Heredity
Mutations
Nuclear and cytoplasmic inheritance
Epistatic gene differs from dominant gene in
Epistatic and hypostatic genes are present at different loci
Epistatic gene is non allelic
Epistatic gene never expresses itself independently
All of the above
A pea with white flowers was crossed to another pea with white flowers. When selfed the F2 generation produced purple and white in the ratio 9:7. The reason for the results is that
It is a typical monohybrid Mendelian ratio
Purple flower colour is dominant over the white
It is a complementary factor
None of the above
When a yellow mouse was crossed to another yellow mouse, the F1 generation produces yellow and brown-black mice in the ratio 2:1. The yellow mice are never homozygous. The reason is
Homozygous yellow cannot survive due to lethal effect of genes
Yellow mice are not very suitable to live
There is no formation of zygotes with homozygous yellow constitution
None of the above
