Which branch of biology deals with the study of heredity and variation? MCQ with Answer and Explanation

Which branch of biology deals with the study of heredity and variation?
A. Paleontology
B. Embryology
C. Ecology
D. Genetics
Answer: Option D
Solution (By JKSSB Mock Tests)
Genetics is the science of heredity and variation, explaining how traits are passed from parents to offspring and why individuals differ. Ecology studies organisms and environment, embryology deals with development, paleontology with fossils. Gregor Mendel is the father of genetics. The term 'genetics' was coined by William Bateson.

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Practice More Biology Questions

Question #1
In the female reproductive system, fertilization normally occurs in the:
A. Fallopian tube (oviduct)
B. Ovary
C. Uterus
D. Cervix

Correct Answer: Option A


Explanation:
The fallopian tube (oviduct) is the site of fertilization where sperm meets the ovum. The fertilized zygote then travels to the uterus for implantation. Ovary releases the ovum. The uterus is the site of implantation and fetal development. Cervix is the lower narrow portion of the uterus. The ampulla of the fallopian tube is the most common fertilization site.

This question belongs to: Science Biology
Question #2
During which stage of mitosis do spindle fibers attach to the centromeres of chromosomes?
A. Prometaphase
B. Anaphase
C. Prophase
D. Metaphase

Correct Answer: Option A


Explanation:
In prometaphase, the nuclear envelope breaks down, and spindle microtubules attach to kinetochores at the centromeres of chromosomes. This is a crucial step before alignment. In prophase, chromosomes condense; metaphase aligns them at the equator; anaphase separates chromatids. Prometaphase follows prophase in many descriptions.

This question belongs to: Science Biology
Question #3
Consider statements about five kingdom classification: 1. Monera includes all prokaryotes. 2. Protista includes unicellular eukaryotes. 3. Fungi are photosynthetic autotrophs. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 and 2 only

Correct Answer: Option D


Explanation:
R.H. Whittaker's five kingdom classification places all prokaryotic organisms in Kingdom Monera and unicellular eukaryotes in Kingdom Protista. Fungi are a distinct kingdom characterized by heterotrophic nutrition, primarily saprophytic or parasitic, and possess chitinous cell walls. They are not photosynthetic autotrophs. Therefore, statements 1 and 2 are correct, while 3 is incorrect.

This question belongs to: Science Biology