Barr body is missing in the female suffering from

• Huntington's disease

• Tay-sach's disease

• Klinefelter's syndrome

• Turner's syndrome.

Select the correct explanation for the labels A, B, C and D

• A represents the fertilised zygote.

• B represents the stage of morula formation.

• C represents the blastocyst.

• D represents the blastocyst implantation

Which of the following set of options is used in translation

• hnRNA, tRNA, rRNA

• mRNA, tRNA, rRNA

• mRNA, tRNA, hnRNA

• hnRNA, rRNA, tRNA

Which is genetically not possible

• Haemophilic father transfers the haemophilic gene to his son.

• Haemophilic father transfers the haemophilic gene to his daughter.

• Carrier mother transfers the haemophilic gene to her son.

• Carrier mother transfers the haemophilic gene to her daughter

Which one ofthe following is reptilian ancestor of birds

• Hesperornis

• Archaeopteryx

• Ichthyornis

• Lycaenops

One out of the following is not responsible for biodiversity loss

• Alien species invasion

• Co-extinction

• Ex-situ conservation

• Deforestation

Which of the following pathogens is not transmitted by a vector

• Salmonella typhi

• Alpha virus

• Plasmodium

• Wuchereria bancrofti

Primary endosperm nucleus (PEN) is formed by the fusion of

• 2 polar nuclei + I synergid cell nucleus

• I polar nucleus + I antipodal cell nucleus + I synergid cell nucleus

• 2 polar nuclei+ I male gamete nucleus

• 2 antipodal cell nuclei + I male gamete nucleus

In rabbits, the gene for grey fur (G) is dominant over that for black fur (g). In a litter, if 50% rabbits are grey, then the possible parental cross combination is

• GG x Gg

• gg X gg

• GG x GG

• Gg x gg

Which organism is used to transfer T-DNA

• Streptomyces hygroscopicus

• Agrobacterium tumefaciens

• Salmonella typhi

• Escherichia coli