12 Biology- 5 Principles of Inheritance and variation: Online Test
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Developed by Dr. Abhijit Saha, Training Associate (Biology) ZIET Bhubaneswar
Mendel's Law was rediscovered by
Correns, De Vries, Morgan
Correns, Tshermak,, Morgan
Correns, Tshermak,, Boveri
Correns, Tshermak,, deVries
If tall pea plant (Tt) is crossed with dwarf plant(tt), which one of the following will be obtained?
Red flower (RR) flower of Antirrhinum is crossed with white flower (rr). If the offspring obtained in F1 generation is pink flower, what type of inheritance will it be called?
The allele which fails to express in the presence of another allele of the same character is called ______ allele.
If two genes lie very close to each other, it will show
high degree of crossing over
double crossing over
nil or low crossing over
The genotype of a plant is AaBb. How many different type of genotype in gametes it can produce?
Application of Mendel's law is limited to
when parents are true breeding types
linked genes only
very high recombinants
Strength of linkage is inversely proportional to distance between
If the father is haemophilic and mother is normal, then the daughter will have chance to
be carrier of haemophilia
be normal always
not receive any gene of haemophilia any time
Turner syndrome is
Crossing over occurs in
When a single gene causes more than one effect, it is called
Of the seven characters studied by Mendel, which of the following trait mentioned below is incorrect?
Axillary flower is dominant trait
green colour seed is a recessive trait
Green colour pod is a recessive trait
wrinkled seed is a recessive trait
Given below are statements on Mendelian Monohybrid cross. Find the statement which is not correct.
Reciprocal crosses produce same results
Contrasting traits appear in F2 generation in the ratio 3:1
Only the dominant trait expresses in the F2 generation
one of the contrasting trait remains unexpressed in F1 generation
Who coined the term 'gene'?
Which of the following statement is considered to be universal?
within a pair of factors, one always dominates the other
Two factors of a trait separates during gamete formation
Blending of traits do not occur
None of the statements are universal
Which of the following is not the cause of Mendel's success in formulating basic principles of heredity?
Garden pea was ideal for controlled breeding since cross pollination was easy
Mendel selected pea plants randomly from his garden for experiments
He used statistical method and laws of probability to analyse results
He studied inheritance of single character with two contrasting traits at a time
Given below are statements to differentiate between genotype and phenotype. On of the statements is incorrect. Find it.
Genotype is the gene equipment which determines the trait whereas phenotype is expression of the trait
Phenotype can be observed directly while genotypes cannot be observed but ascertained
genotype changes under environmental influence, phenotype do not
Phenotype is determined by genotype while genotype is not determined by phenotype
Which of the following statement is not correct about Incomplete dominance?
Both the allele expresses their typical phenotypes
Hybrid has new phenotype but has no gene
There is blending of traits
alleles show quantitative effect
Study the following statements on Sex Linked inheritance. Find the incorrect statement.
Father passes X linked allele to his daughter who in turn passes to her son
Mother passes the allele both to her daughter and son
X-linked alleles are more likely to express in females than males
Most of the sex linked traits are recessive
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