Give a graphical representation on different types of Birth Control
Answers
2.Draw the neat labelled diagram on the Structure of Antibody.
Ans : Refer to the Attachment.
3.Give a Short description on the structure of Sperms.
Ans : In most species, there are just two types of gamete, and they are radically different. The egg is among the largest cells in an organism, while the sperm (spermatozoon, plural spermatozoa) is often the smallest. The egg and the sperm are optimized in opposite ways for the propagation of the genes they carry. The egg is nonmotile and aids the survival of the maternal genes by providing large stocks of raw materials for growth and development, together with an effective protective wrapping. The sperm, by contrast, is optimized to propagate the paternal genes by exploiting this maternal investment: it is usually highly motile and streamlined for speed and efficiency in the task of fertilization. Competition between sperm is fierce, and the vast majority fail in their mission: of the billions of sperm released during the reproductive life of a human male, only a few ever manage to fertilize an egg.
4.Give a graphical representation on different types of Birth control.
Ans : Birth control is any method used to prevent pregnancy. There are many different methods of birth control including condoms, IUDs, birth control pills, the rhythm method, vasectomy, and tubal ligation.
✭Birth Control Guide
✭Birth Control Options
✭Best Birth Control Methods
✭IUDs
✭Condoms
✭Female Condoms
✭Birth Control Pills
✭Implants
✭Vasectomy
✭Emergency Contraception
✭Birth Control Myths
✭Permanent Birth Control
✭Tubal Ligation
5. Give a Short note on Sex determination in Birds.
Ans: The sex chromosomes in birds are designated Z and W, and the male is the homomorphic sex (ZZ) and the female heteromorphic (ZW). In most avian species the Z chromosome is a large chromosome, usually the fourth or fifth largest, and it contains almost all the known sex-linked genes. The W chromosome is generally a much smaller microchromosome, containing a high proportion of repeat sequence DNA. Recently a gene encoding a protein involved in transcriptional activation of chromatin has been detected on the W chromosome. The weight of evidence suggests that sex determination in birds is by a genic balance mechanism, in which the ratio of autosomes to Z chromosomes is the crucial factor. DNA sequences homologous to the testis determining factor in humans have been detected in both male and female birds, but it is not clear that they have a sex-related function in birds. A number of different practical methods have been developed to distinguish the sex of birds, based on sex-linked genes, the amount of DNA per cell and using DNA probes for sex-linked sequences.
Explanation: