what are the two ways in which a defective gene may appear in an individual? how will you categorize colour blindness haemophilia and albinism (non heritable) under these two ways
Answers
Ways in which defective genes appear
Explanation:
1.Spontaneous mutation-A biological condition in which environmental factors causes change in DNA structure, results in spontaneous mutation.
2. UV or Nuclear radiation-Another important factor that causes change in DNA structure. Chemical toxins,carcenogenous products like smoke causes lung cancer,Ultra violent light released from sunlight cause skin cancer.
Distinguish between color blindness, albinism and haemophilia
Explanation:
Color blindness occur when rod and cone cells don't response to lights with various wavelength and thus the affected person can't detect any color.
Albinism is a congenital disease that is cause due to partial or complete absence of pigment in skin,eye or hair.
Haemophilia is inherited genetic disorder in which body fails to stop bleeding that is dysfunction in blood clotting system results in continuous bleeding.