In the pedigree of a family shown above, brown eyes are indicated as white circles and blue eyes as dark circles. Javeria and Juhi are twins. From this chart, it can be determined that:

When a hemophiliac carrier woman marries a normal man, who among her offspring may be affected:

Which phenomenon reduces the chances of genetic recombination and variations among offspring?

Which of the following traits is transmitted directly from an affected father to only his sons?

The gene which controls the ABO group has how many alleles in an individual?

A pure breeding plant with the dominant phenotype of character P and the recessive phenotype of character Q was crossed with another pure breeding plant with the recessive phenotype of character P and the dominant phenotype of Q. The offspring of this cross were crossed with a double homozygous recessive for P and Q and the following results were obtained: 22 were phenotypically dominant for P and recessive for Q 5 were phenotypically dominant for both P and Q 4 were phenotypically recessive for both P and Q 24 were phenotypically recessive for P and dominant for Q Which one of the following types of Inheritance is illustrated by these results?

Flower color is controlled by a single pair of alleles. The allele for red flowers is dominant to the allele for white flowers. A plant homozygous for red flowers is crossed with a plant homozygous for white flowers. All the resulting plants have red flowers (F1 generation). When the F1 generation crosses with each other, 18 plants are obtained. 12 plants have red flowers and 6 have white flowers (F2 generation). What ratio is expected in the F2 generation and what ratio has been obtained?