DNA molecules are called Master molecules - Give reason
Write short note on Down syndrome.
Write short note on monogenic disorders.
Q.3. Answer the following questions: (Any 2)
What are the effects of tobacco consumption?
What is sickle-cell anaemia? Write its symptoms and treatme
Describe the structure of DNA molecule.
Explain the structure, function and types of RNA.
Q.4. Answer the following:
Explain Mendel's monohybrid progeny with the help of any
Answers
Answer:
1)) DNA molecules are called Master molecules because they carry genetic information from parents to offspring
2)) Down syndrome is a chromosomal condition that occurs when an error in cell division results in an extra chromosome 21. Down syndrome can affect a person's cognitive ability and physical growth, cause mild to moderate developmental issues, and present a higher risk of some health problems.
3)) 1. Without enough red blood cells, your body can't get enough oxygen, causing fatigue. Episodes of pain. Periodic episodes of pain, called pain crises, are a major symptom of sickle cell anemia. Pain develops when sickle-shaped red blood cells block blood flow through tiny blood vessels to your chest, abdomen and joints.
3)). 2. DNA is made up of molecules called nucleotides. ... Nucleotides are attached together to form two long strands that spiral to create a structure called a double helix. If you think of the double-helix structure as a ladder, the phosphate and sugar molecules would be the sides, while the base pairs would be the rungs.
4)). A genetic cross between parents that differ in the alleles they possess for one particular gene, one parent having two dominant alleles and the other two recessives. All the offspring (called monohybrids) have one dominant and one recessive allele for that gene (i.e. they are hybrid at that one locus).