What is the study of heredity called?

  • Hereditology
  • Anthropology
  • Genetics
  • Biology

ANS:  Genetics.

Genetics is the scientific study of genes and heredity of how certain traits or characteristics are passed from parents to children.

What are genes?

  • A double helix
  • Histones
  • A code of DNA
  • The study of Genetics

ANS:  A code of DNA.

Genes are made up of sequences of DNA and are arranged one after another at specific locations on chromosomes.

Full form of DNA:

  • Dominant Nuclear Acid
  • Deoxyribonucleic Acid
  • Dual Nitrogen Acid
  • Denominator of Numerous Alleles

ANS: Deoxyribonucleic acid.

DNA full form is deoxyribonucleic acid, and it is the hereditary material in humans.

What are alleles?

  • Not a part of genetics
  • The color of the eyes
  • The shape of the nose
  • Alternate forms of genes

ANS: Alternate forms of genes.  

Alleles are two forms of genes, one from the biological mother and one from biological father.

Which term means “same alleles?”

  • Heterozygous
  • Hybrid
  • Homozygous
  • There is no such term

ANS: Homozygous.

Homozygous is the presence of two identical alleles at a particular gene position.

Genotype is:

  • Physical appearance
  • Mendelian traits
  • Complete set of genetic material
  • None of the above

ANS: Complete set of genetic material.   

The term “genotype” refers to the genetic makeup of an organism, it describes an organism’s complete set of genes.

A phenotype is:

  • Physical appearance
  • Genetic makeup
  • Two alleles
  • None of the above

ANS: Physical appearance.

Phenotype refers to an individual’s observable characteristics, such as height, eye color and blood type.

What is a change in a gene called?

  • Genetics
  • A mutation
  • A gene
  • A pedigree

ANS: A mutation.

Mutations are any change in the DNA sequence of a cell. Mutations may be caused by mistakes during cell division or caused due to exposure to DNA-damaging agents in the environment.

Number of chromosomes in humans

  • 23
  • 46
  • 15
  • 6

ANS: 46.

In humans, each cell has 23 pairs of chromosomes and that makes it a total of 46 chromosomes.

Who is the Father of Genetics?

  • Ian Wilmot
  • Oswald Avery
  • Marie Curie
  • Gregor Johann Mendel

ANS: Gregor Johann Mendel.

Gregor Johann Mendel is the father of genetics. He worked on pea plants and discovered the fundamental laws of inheritance.

Which chromosome is larger, X or Y?

  • X
  • Y
  • They are the same size.
  • I don’t know


The X chromosome is five times larger than the Y chromosome and has 10 times the number of genes. Therefore, X chromosome carries more traits than the Y chromosome.

DNA “packaged” in?

  • In chromosomes
  • In genomes
  • In nucleotides
  • It floats on its own.

ANS: Chromosomes.  

In the nucleus of each cell, the DNA is packaged into thread-like structures known as chromosomes.

What is shaped like a double helix (twisted ladder)?

  • Nucleotides
  • Genes
  • Chromosomes
  • DNA molecules

ANS: DNA molecules.

Double helix is a term used to describe the physical structure of DNA. A DNA molecule is made up of two linked strands that wind around each other like a twisted ladder.

What is heredity?

  • The passing of genes from one’s parents to children
  • The study of genes
  • Genetics
  • Plants scattering pollen

ANS: The passing of genes from one’s parents to children.

Heredity, also called inheritance, is the passing on of genes from parents to their children.

Homozygous dominants are represented with:

  • Capital letter
  • Roman numeral
  • Hair color
  • Lower case letter

ANS: Capital letter.

A homozygous genotype is where both the alleles are the same, and an organism having a homozygous genotype is true-breeding or pure bred. Dominant alleles are represented with capital letters.

Loss of a chromosome segment is known as

  • Inversion
  • Deletion
  • Polyploidy
  • Duplication

ANS: Deletion.

Deletions can occur when a chromosome breaks, and genetic material is lost or ‘deleted’. Deletions can either be large or small and can occur anywhere along a chromosome.

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