10th Class Biology Solved MCQS Chapter 6

Variatations show distinct phenotypes and phenotypes of such variations cannot be measured by:

Discontinuous variations

None of these

Continuous variations

Both a and b

Genes consist of.

RNA

Protein

mRNA

DNA

These are unit of inheritance :

Phenotype

Genes

Alleles

Genotype

A purple flowered pea plant has the genotype PP, which of the following statements about this plant is FALSE.

When bred to a white flowered plant all offspring will be purple flowered.

Its phenotype will be white flowers .

All the gametes produced will have the same flower colour allele

It has a homozygous dominant genotype.

It is a situation where in heterozygous genotypes, both the alleles express as a blend and neither allele is dominant over the other:

None of these

Incomplete dominance

Co-dominance

Complete dominance

In an arranged data the value lying in the middle is called:

Median

Mode

All of them

Average

Inherited characters are called.

Fertilization

Traits

Genes

Genetics

How many genotypes are possible for the allele A and a ?

four

two

three

seven

Transmission of Characters from parent to offspring is called.

Repreduction

Mutation

Inheritance

Regeneration

Charles Darwin proposed that organisms produce many more offspring than can possible survive on the limited amount of resources available to them. According To Darwin, the offspring that are most likely to survive are those that.

Are best adapted to the environment.

Are born first and grow fastest

Are largest and most aggressive

Have no natural predators