laboursonline – MCQs, Mock Tests | General Science Basic Science Genetics Linkage And Crossing Over

Linkage is maize was reported by

1. Bateson
2. Morgan
3. Hutchinson
4. Sinnot

✅ Correct Answer: 3

The genes located on the same Chromosome that are inherited together are known as

1. Complementary genes
2. Supplementary genes
3. Mutant genes
4. Linked genes

✅ Correct Answer: 4

In maize parental and recombinations are produced in the ratio of

1. 50:50:00
2. 9:07
3. 96.4:3.6
4. 1:7:7:1

✅ Correct Answer: 3

The scientists who proved that Mendel's law of independent assortment is not universal

1. Morgan and Mendel
2. Chiasmata
3. Bateson and Punnet
4. Sinnot and Punnet

✅ Correct Answer: 3

The adjacent non-sister chromatid remain in contact at certain points called

1. Locus
2. Chiasmata
3. Linkage
4. Coupling

✅ Correct Answer: 2

Linkage is clear in

1. Paddy
2. Maize
3. Snapdragon
4. Sweet pea

✅ Correct Answer: 2

Genes located on the same Chromosome do not separate independently because of

1. Crossing over
2. Linkage
3. Mutation
4. Factors interaction

✅ Correct Answer: 2

Coupling and repulsion are experimented on fruit fly by

1. Bateson
2. Morgan
3. Punnet
4. Sinnot

✅ Correct Answer: 2

Pairing of homologous chromosomes is called

1. Terminalisation
2. Linkage
3. Crossing over
4. Synapsis

✅ Correct Answer: 4

The scientist who considered that the genes carried on the same chromosome remain linked as a group and are transmitted together through the gametes to the offspring

1. Hutchinson
2. Bateson
3. Morgan
4. Correns

✅ Correct Answer: 3

The scientist who discovered that coupling and repulsion are two aspects of a single phenomenon called linkage is

1. Bateson
2. Mendel
3. Morgan
4. Punnet

✅ Correct Answer: 3

Due to linkage in maize, the number of colourless shrunken seeds produced are

1. 4032
2. 4035
3. 149
4. 152

✅ Correct Answer: 2

The Zoological name of fruit fly is

1. Drosophila melanogaster
2. Cicer gigas
3. Cicer arietinum
4. Mirabilis jalapa

✅ Correct Answer: 1

Coupling and repulsion are two aspects of same phenomenon called

1. Linkage
2. Crossing over
3. Evolution
4. Variation

✅ Correct Answer: 1

Homologous chromosomes exchange corresponding segments between non-sister chromatids during

1. Linkage
2. Crossing Over
3. Mutation
4. Epistasis

✅ Correct Answer: 2

When two different genes come from the same parent they tend to remain together is called

1. Coupling
2. Repulsion
3. Linkage
4. Crossing over

✅ Correct Answer: 1

Linkage is usually

1. Complete
2. Incomplete
3. Intermediate
4. Full

✅ Correct Answer: 2

Due to linkage in maize, the number of coloured shrunken seeds produced are

1. 4032
2. 4035
3. 149
4. 152

✅ Correct Answer: 3

In maize the genotype of colourless full seeds in

1. CcSs
2. Ccss
3. ccSs
4. ccss

✅ Correct Answer: 1

Linkage usually gets broken due to

1. Mutation
2. Cross over
3. Epistasis
4. Variation

✅ Correct Answer: 2

During crossing over, exchange of chromosomal or genetic material takes place between

1. two chromatids
2. two chromosomes
3. two non-sister chromatids of each tetrad
4. two sister chromatids of each homologue

✅ Correct Answer: 3

In maize the genotype of coloured full seeds is

1. CcSs
2. Ccss
3. Ccss
4. ccss

✅ Correct Answer: 1

The tendency of two different genes to remain apart if they come from two different parents is

1. Coupling
2. Repulsion
3. Linkage
4. Crossing over

✅ Correct Answer: 2

Recombination of linked genes is accomplished by

1. Linkage
2. Epistasis
3. Mutation
4. Cross over

✅ Correct Answer: 4

The genotype of colourless shrunken seeds in maize is

1. CcSs
2. ccss
3. Ccss
4. ccSs

✅ Correct Answer: 2

Crossing Over occurs when the homologous chromosomes contain

1. One chromatid
2. Two chromatid
3. Four chromatid
4. Eight chromatid

✅ Correct Answer: 3

The ratio obtained by Bateson and Punnet when they test crossed second time between blue long and red round in sweet pea

1. 7:1:1:7
2. 1:1:1:1
3. 1:7:7:1
4. 9:3:3:1

✅ Correct Answer: 3

The ratio observed by Bateson and Punnet when they test crossed in sweet pea between BbLl and bbll was

1. 9:3:3:1
2. 9:07
3. 7:1:1:7
4. 12:03:01

✅ Correct Answer: 3

The number of Chromosomal pairs in Drosophila melanogaster is

1. 1 pair
2. 2 pair
3. 3 pair
4. 4 pair

✅ Correct Answer: 4

Crossing over plays an important role in the process of

1. Mutation
2. Heredity
3. Evolution
4. Variation

✅ Correct Answer: 3

Mutation helps for

1. evolution
2. cell division
3. fertilization
4. protein synthesis

✅ Correct Answer: 1

New combination of genes are produced due to

1. Linkage
2. Epistasis
3. Crossing over
4. Duplication

✅ Correct Answer: 3

The mechanism that provides the basis for new varieties of plant is

1. Linkage
2. Crossing over
3. Epistasis
4. Repulsion

✅ Correct Answer: 2

An important criterion for evolution of organisms is

1. Mutation
2. Heredity
3. Evolution
4. Variation

✅ Correct Answer: 4