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How many phenotypes and genotypes are possible for ABO blood groups?

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Important Questions on Heredity and Variation

MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
Match the terms in Column-I with their description in Column-II and choose the correct option:
 
Column – I Column – II
(a) Dominance (i) Many genes govern a single character
(b) Codominance (ii) In a heterozygous organism, only one allele expresses itself
(c) Pleiotropy (iii) In a heterozygous organism, both alleles express themselves fully
(d) Polygenic inheritance (iv) A single gene influences many characters
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
When homozygous 'A' blood group Man marries homozygous 'B' group Woman in 'F1' generation and 'AB' group of springs are born. When these 'F1' individuals marry each other. in 'F2' generation individuals with how many blood groups are born?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics

Which kind of inheritance is shown by human blood group?

(i) Incomplete dominance

(ii) Co-dominance

(iii) Multiple allele

(iv) Pleiotropy

MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
If the genotypes determining the blood groups of a couple are IAI0 and IAIB, then the probability of their first child having type O blood is
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
A pleiotropic gene
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
What are multiple alleles ? Describe multiple alleles with the help of ABO blood groups in man.
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
Which ONE of the following is the most likely ratio of blood groups (A : B :AB) among the progeny from heterozygous parents with B and AB blood groups?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
What is the possible blood group of children whose parents are heterozygous for A and B blood groups?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
Multiple alleles are present:
HARD
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics

Study the following statements about the blood groups,
A) The genes for Rh antigen are located on somatic chromosome pair-1.
B) Multiple alleles occupy different loci of homologous chromosomes.
C) The expression of blood types in man is by 3 alleles of a single gene.
D) Blood cells of the foetus are destroyed by Ig G type of antibodies.

From the above, identify incorrect statements.

MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
The genotypes of a Husband and Wife are IA IB and IAi .
Among the blood types of their children, how many different genotypes and phenotypes are possible?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
A gene showing codominance has
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following.
HARD
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
In a mating between two mulattos, each heterozygous at all three gene loci for the skin colour, what is the chance their child will have very light skin?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics

The best example for pleiotropy is:

MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
The genotype of a husband and wife are IAIB & IAIO. Among the blood types of their children, how many different genotypes and phenotypes are possible?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
Choose the correct genotypes of parents, who have 50% of their progeny with B blood group
EASY
Biology>Genetics and Evolution>Heredity and Variation>Deviation from Mendelian Genetics
If both parents have AB group, this blood group is not expected in their children.