Human Reproduction — BIOLOGY STD 12 Science — Question

Inheritance is particulate in nature. Justify.

Draw a biomass pyramid of the aquatic ecosystem, starting with phytoplanktou. Write the limitations of ecological pyramids.

“Intra-cytoplasmic sperm injection” and “Gamete Intra Fallopian Transfer (GIFT)” are two assisted reproductive technologies. How is one different from the other?

Explain how a hereditary disease can be corrected. Give an example of first successful attempt made towards correction of such diseases.

What is menstrual cycle? Which hormones regulate menstrual cycle?

Explain the function of each of the following:
Coleorhiza

Explain the permanent methods of birth control.

Explain giving three reasons why tropics show, greatest level of species diversity.

A new type of drug, PTC 124, enables translation to continue through the nonsense codon. Trials in mice homozygous for a CFTR allele containing the nonsense codon have found that animals treated with PTC 124 produce normal CFTR protein in their cells. The drug is taken orally and is readily taken up into cells all over the body.
Using your knowledge of the progress towards successful gene therapy for cystic fibrosis, suggest why PTC 124 could be simpler and more reliable treatment for this disease.

In garden pea plants, the green colour of the pod (G) is dominant over the yellow colour of the pod (g). To determine the genotype of a plant with an unknown genotype, use a Punnett square to show the genotypes and phenotypes in a test cross.