Law of independent assortment can be proved on the basis of which of the following ratios:
3 : 1
2 : 1 : 1
9 : 3 : 3 : 1
2 : 1
In Down's syndrome of a male child, the sex complement is
XO
XY
XX
XXY
A true breeding tall and smooth -seeded pea plant is crossed with a true breeding dwarf and wrinkled-seeded plant. The fact that F1 plants were all tall demonstrates:
Principle of assortment of characters
That recombination of characters appears in F2 generation
That P1 tall plants were heterozygous
That tallness was dominant to dwarfness
Visible characteristics of an organism are called:
Phenotypes
Genotypes
Homozygous
Heterozygous
A family of five daughters only is expecting sixth issue. The chance of its being a son is
Zero
25%
50%
100%
Which contribute to the success of Mendel?
Qualitative analysis of data
Observation of distinct inherited traits
His knowledge of biology
Consideration of one character at one time
Haemophilia is more common in male because it is a
Recessive character carried by Y-chromosome
Dominant character carried by Y-chromosome
Dominant trait carried by X-chromosome
Recessive trait carried by X-chromosome
Triticale has been evolved by intergeneric hybridization between
Wheat and rye
Wheat and rice
Rice and maize
Wheat and aegilops
Both husband and wife have normal vision though their fathers were colourblind. The probability of their daughter becoming colourblind is
0%
75%
