Question

The physical expression of a specific trait, such as hair color or blood type, is called the __________________________

A variant form of a gene is called an ______________________

The female reproductive organs that produce estrogens and progesterone are the __________________

Answer 1

Question.

The physical expression of a specific trait, such as hair color or blood type, is called the:

Answer: phenotype.

Explanation: The expression of specific characteristics and traits which can be observed in an organism is called as phenotype. Examples are :- the color of hair, color of iris of eyes, blood group, height. Due to the expression of specific genes and environmental factors, phenotype is expressed.

Genotype represents the genetic and hereditary information stored in an individual's genes. It determines the phenotype (observable characteristics) of an individual.

Question.

A variant form of a gene is called an:

Answer: allele

Explanation: Allele represents one of the two forms of a gene located at a specific position on the chromosome in an organism. A trait is generally regulated by two different genes, one of which is dominant and other being recessive. For every gene regulating a trait, there can be two alleles of the same gene, one being dominant and other being recessive. Examples:- brown or blue eyes, tall or dwarf height.

Question.

The female reproductive organ that produce the hormones estrogen and progesterone are the:

Answer: ovaries

Explanation: The follicle stimulating hormone (FSH) of the anterior pituitary gland stimulates the process of oogenesis in the ovaries. The developing follicles secrete the hormone estrogen and progesterone which controls the secondary sexual characters in females as well as prepares the female reproductive system for pregnancy. The granulosa cells of the developing follicles secrete estrogen. The corpus luteum which is formed after the mature Graafian follicle release the ovum under the influence of luteinizing hormone (LH), secretes the hormone progesterone.