71.

The main function of mammalian corpus luteum is to produce

• estrogen only

• progesterone

• human chorionic gonadotropin

• human chorionic gonadotropin

Select the correct option describing gonadotropin activity in a normal pergnant female

• High level of FSH and LH stimulates the thickening of endometrium

• High level of FSH and LH facilitate implantation of the embryo

• High level of hCG stimulates the synthesis of estrogen and progesterone

• High level of hCG stimulates the synthesis of estrogen and progesterone

Tubectomy is a method of sterilisation in which 

• Small part of the Fallopian tube is removed or tied up

• Ovaries are removed 

• Small part of vas deferens is removed or tied up

• Small part of vas deferens is removed or tied up

Which of the following is a hormone-releasing Intra Uterine Device (IUD)?

• Multiload 375

• LNG - 20

• Cervical cap

• Cervical cap

Assisted reproductive technology, IVF involves transfer of 

• ovum into the Fallopian tube 

• zygote into the Fallopian tube 

• zygote into the uterus

• zygote into the uterus

In a population of 1000 individuals 360 belongs to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is

• 0.4

• 0.5

• 0.6

• 0.6

A human female with Turner's syndrome

• has 45 chromosomes with XO

• has one additional X - chromosome

• exhibits male characters

• exhibits male characters

Commonly used vectors for human genome sequencing are

• T-DNA

• BAC and YAC

• Expression vectors

• Expression vectors

Forelimbs of cat, lizard used in walking forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of 

• analogous organs

• adaptive radiation

• homologous organs

• homologous organs

Which one of the following are analogous structures?

• Wings of bat and wings of pigeon

• Gills of prawn and lungs of man

• Thorns of Bougainvillea and tendrils of Cucurbita

• Thorns of Bougainvillea and tendrils of Cucurbita