Principle of inheritance and variation practice · Mixed difficulty

Linkage groups are always present on the

Fruitfly is excellent model for genetics because of
I. Small life cycle (two week)
II. Can be feed on simple synthesis medium
III. Single mating produce large number of progeny
IV. Clear differentiation of sexes
V. Many heredity variation can be seen with low power microscopes
Choose the correct option

When two genetic loci produce identical phenotypes in cis and trans position, they are considered to be

XXY genotype shows:

A normal woman whose father was colour blind is married to a normal man. The sons would be

Mahesh (who is colourblind) and Soni (who is not colourblind) have a daughter Alia. Rishi (who is not
colourblind) and Neetu (who is a carrier) have a son Ranbeer. Alia and Ranbeer get married. What is the
probability that their daughter will be colorblind?

Incomplete dominance is shown by

Genes A, B and C are linked. Genes A and B are more close than A and C. Find out the correct option for the given statements
I. A might be before B and C
II. B might be between A and C
III. C might be between A and B
IV. More crosses has occurred between A and C than A and B

When both parents are of blood type AB, they can have children with

Identify a Mendelian disorder from the following.

In which genetic condition, each cell in the affected person has only one sex chromosome, i.e. XO?

Phenylketonuria, Huntington’s disease and sickle cell anaemia are caused respectively due to disorders associated with

A colorblind man with hypertrichosis married a woman whose mother is homozygousnormal visioned and
father is colorblind. Then in their progeny

How many gametes can be produced by a diploid organism, if it is heterozygous for 4 loci?

How many statements are correct according to given type of cross:

Aa Bb Cc DD X Aa Bb Cc DD

a. It is trihybrid cross

b. It is tetrahybrid cross

c. 8 Types of gametes are formed

d. 9 types of genotypes are formed

A color blind woman marries a normal visioned male. In the offspring

Assertion (A): Multiple alleles can be found only when population studies are made.

Reason (R): Occasionally, a single gene product may produce more than one effect.

The specific pair of chromosomes which determine the sex of the individual called

Types of gametes formed by the plant with genotypes AABbccDD will be

Tall (T) is completely dominant over dwarf (t). Red flower colour (R) is incompletely dominant over white (r),
the heterozygote being pink. Plant having genotype of TtRr is self pollinated. What would be the proportion
of plants with both dwarf and pink characters in its progeny?

Linked gene are present on

Mendel’s experimental material was

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of
the male progeny, the disease is

A plant of${\mathrm{F}_1}$- generation has genotype ‘AABbCC’. On selfing of this plant, the phenotypic ratio in ${\mathrm{F}_2}$- generation will be

Universal donor is

Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they

During …A… both members of chromosome pair as well as …B… separate and pass to different gametes. Choose the correct option for A and B

How many matching are corrects:

a. Haemophilia - Queen victoria pedigree

b. Phenylketonuria - Inborn error of metabolism

c. Colour blindness - More appears in female than male

d. Sickel cell anaemia - Shape of RBC is biconvex disc

Pure tall plants are crossed with pure dwarf plants. In the ${\mathrm{F}_1}$-generation, all plants were tall. These tall plants of ${\mathrm{F}_1}$-generation were selfed and the ratio of tall to dwarf plants obtained was 3: 1. This is called

In a normal couple, half of the sons are haemophilic while half of the daughters are carriers, the defective gene is located on