Principle of inheritance and variation practice · Mixed difficulty

A child has heterozygous allele for blood group A. What can be most possible interpretation w.r.t. blood group of his/her parents?
A) Both the parents have same genotype ${\mathrm{I}^\mathrm{A}}\,\,{\mathrm{I}^\mathrm{O}}$ and ${\mathrm{I}^\mathrm{A}}\,\,{\mathrm{I}^\mathrm{O}}$
B) Both the parents are of blood group O
C) One of the parent may have blood group AB while other have blood O.

Genetic variation cannot be effectively brought about by

A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

Which of the following blood groups’ person can not donate blood to other?

The genotypes of a plant variety were TtHh, Tthh, ttHh and tthh, where T = tallness and H = hairy stem. Which one of the following crosses would produce progeny giving a phenotypic ratio approximately $1: 1: 1: 1$?

Which of the following pairs of features is a good example of polygenic inheritance?

In a plant, red fruit (R) dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTT genotype is crossed with a plant that is rrtt. Then

After examining the blood groups of husband and wife, the doctor advised them not to have more than one child, the blood group of the couple are likely to be

In blood group typing in human, if an allele contributed by one parent is ${\mathrm{I}^\mathrm{A}}$and an allele contributed by the other parent is i, the resulting blood group of the offspring will be

Chromosomes are made up of

The nucleoprotein structures that occur at the ends of the chromosomes are

Chromosome is made up of

Assertion (A): Gynacomastia is observed in Turner's syndrome.

Reason (R): Such a disorder is caused due to the presence of extra copy of X-chromosome.

A man and a woman, who do not show any apparent sign of a certain inherited disease, have seven children (two daughter and five sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?

Multiple allele can be manifested only when there is the study of

Genes for cytoplasmic male sterility in plants are generally located in

Select the correct statement from the ones given below with respect to dihybrid cross.

Two crosses between the same pair of genotypes or phenotypes, in which the sources of the gametes are reversed in one cross, is known as

Ishihara chart is used to detect

What will be the linkage strength present between two genes A & B, which are 6 cM far from each other on a chromosome?

Assertion : Sickle-cell anaemia is a genetically
determined disorder affecting many new born
babies.

Reason : It is caused by heterozygosity for
allele $H{b^s}$
producing a single amino acid
substitution in the a-chain of the normal
haemoglobin molecule determined by allele $H{b^A}$
.

Mendel work later formulated into laws of
I. Linkage
II. Segregation
III. Incomplete dominance
IV. Independent assortment
Choose the correct option

In which cross will you get most pink flowers?

In Mendel's experiment the study of inheritance of one gene (cross between tall and dwarf plant) in $\mathrm{F}_2$ generation showed :

Cytoplasmic inheritance always shows

Total number of progeny of a dihybrid cross is 640 in $F_2$ generation. How many are recombinants:

A person is suffering from disease phenylketonuria, which is an autosomal recessive disease. Which of these is lacking in the person?

In Snapdragon, pure line tall plant with red flower was crossed with dwarf and white flowered plant; $F_1$ was test crossed to obtain $F_2$. What is the probability of getting progeny with dominant parental traits?

Incomplete dominance is seen in?

Linkage group is