In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree. 
Autosomal dominant
X-linked recessive
Autosomal recessive
Autosomal recessive
B.
X-linked recessive
The given pedigree shows the autosomal recessive disorder. In this disorder, the individual inherit two mutated genes, one from each parent. This disorder is usually passed on by two carriers. Health is rarely affected, but individual have one mutated gene(recessive gene) and one normal gene(dominant gene) for the condition. The carriers have a 25% chance of having an unaffected child with normal genes, 50% chance of having an unaffected child who also is a carrier and a 25% chance of having an affected chid with recessive genes.
In his classic experiments on pea plants, Mendel did not use
Seed colour
Pod length
Seed shape
Seed shape
The cutting of DNA at specific locations become possible with the discovery of
Restriction enzymes
Probes
Selectable markers
Selectable markers
Which of the following immunoglobulins does constitute the largest percentage in human milk?
lgD
lgM
lgA
lgA
Balbiani rings rigs are sites of
Lipid synthesis
Nucleotide synthesis
Polysaccharide synthesis
Polysaccharide synthesis
In angiosperms, microsprogenesis and megasporogenesis
occur in anther
form gametes without further divisions
Involve meiosis
Involve meiosis
Which of the following pairs is not correctly matched?
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
0.5
1
Nil
Nil
Ectopic pregnancies are referred to as
Pregnancies with genetic abnormality
Implantation of embryo at site other than uterus
Implantation of defective embryo in the uterus
Implantation of defective embryo in the uterus
