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With the help of a flow chart, illustrate how an infected animal cell can survive while viruses are being replicated or released.
Concept: Sexually Transmitted Diseases (STD) or Sexually Transmitted Infections (STI)
Placed below are case studies of some couples who were not able to have kids. These couples are not ready for adoption or taking gametes from donors. After thoroughly examining the cases, which Assisted Reproductive Technology will you suggest to these couples as a medical expert? Explain briefly with justification of each case.
| Couple | Test reports of Female partner |
Test reports of male partner |
| Couple 1 | Normal reports | Normal sperms in testes, Missing connection in epididymis and Vas deferens. |
| Couple 2 | Blockage in the fallopian tube | Normal reports |
| Couple 3 | Normal reports | Poor semen parameters in terms of count, motility and morphology. |
| Couple 4 | low ovarian reserve | Normal reports |
| Couple 5 | Sterilization in male | Morphologically abnormal sperms |
Concept: Infertility
A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.
Concept: Chromosomal Theory of Inheritance
Explain the relationship between CFC’s and Ozone in the stratosphere.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
Name any two sources of e-Wastes and write two difference ways of their disposal.
Concept: Radioactive Waste Management and E-waste
How have human activities caused desertification? Explain.
Concept: Degradation by Improper Resource Utilisation and Maintenance
State the difference between meiocyte and gamete with respect to chromosome number.
Concept: Chromosomal Theory of Inheritance
Differentiate between male and female heterogamety.
Concept: Sex Determination
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
Concept: Sex Determination
Name the type of cell division involved in the production of sperms by honey bees.
Concept: Chromosomal Theory of Inheritance
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Concept: Sex Determination
What is joint forest management?
Concept: Environmental Issues
What is joint forest management?
Concept: Environmental Issues
How does a desert plant adapt to the dry, warmer environmental conditions ?
Concept: Environmental Issues
How does a desert plant adapt to the dry, warmer environmental conditions ?
Concept: Environmental Issues
Name the pollutant attributed to be the cause of ‘ozone-hole’ over the Antarctica region.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
List the greenhouse gases other than carbon dioxide.
Concept: Greenhouse Effect and Climate Change
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Concept: Sex Determination
How would you find out whether a given tall garden pea plant is homozygous or heterzygous? Substantiate your answer with the help fo Punnett squares.
Concept: Monohybrid Cross
Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.
Concept: Monohybrid Cross
