Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder:
In recent years,DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution,because:
Industrial melanism is an example of:
ELISA is used to detect viruses where the key reagent is:
Which of the following statement is true for Lymph
According to fossils which discovered up to present time,origin and evolution of man was started from which country
Melanin protect from