The mineral element essential for the synthesis of thyroid hormones is: MCQ with Answer and Explanation

Explanation:
Nettie Stevens (1905) discovered that sex is determined by the XY chromosomes in beetles. Morgan later confirmed chromosomal theory. Mendel discovered laws of inheritance.

Explanation:
Ficus religiosa is the sacred fig or peepal tree. Ficus benghalensis is the banyan tree, Azadirachta indica is neem, and Mangifera indica is mango. The peepal tree has heart-shaped leaves with a characteristic elongated tip, and is of religious significance in India.

Explanation:
Down syndrome (trisomy 21) is an autosomal aneuploidy caused by nondisjunction resulting in three copies of chromosome 21. It is characterized by intellectual disability, flat facial profile, protruding tongue, and simian crease. Turner's syndrome is monosomy X (45, X). Klinefelter's is 47, XXY. Phenylketonuria is an inborn error of metabolism (autosomal recessive) due to deficiency of phenylalanine hydroxylase.