Heredity and Variation — Flashcards
Maharashtra Board · Class 9 · Science
24 flashcards for Heredity and Variation (Maharashtra Board Class 9 Science) to test yourself on key terms and facts. Sample: "What is genetics?"
Interactive on Super Tutor
Studying Heredity and Variation? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
What is genetics?
Answer
Genetics is the branch of biology that studies the transfer of characteristics of organisms from one generation to the next, and genes in particular. It helps us understand how traits are inherited fr…
Define heredity and explain why puppies look like dogs.
Answer
Heredity is the transfer of characteristics from parents to offspring. Due to heredity, puppies are similar to dogs, squabs are similar to pigeons, and infants are similar to humans. This ensures spec…
What is a gene and what does it contain?
Answer
A gene is a segment of DNA that contains all the information for synthesis of a particular protein. Genes are the functional units of heredity that control the structure and function of cells and tran…
What is a chromosome and what is it made of?
Answer
A chromosome is the structure in the nucleus of cells that carries hereditary characteristics. It is made up mainly of nucleic acids (DNA) and proteins. Genes, which contain hereditary information in …
Name and describe the four types of chromosomes based on centromere position.
Answer
1. Metacentric: Centromere at mid-point, looks like 'V', equal arms 2. Sub-metacentric: Centromere near mid-point, looks like 'L', slightly unequal arms 3. Acrocentric: Centromere near one end, looks …
How many chromosomes do humans have and how are they organized?
Answer
Humans have 46 chromosomes organized as 23 pairs. Out of these, 22 pairs are autosomes (non-sex chromosomes) and 1 pair consists of sex chromosomes (allosomes). Women have 44 + XX and men have 44 + XY…
Describe the structure of DNA according to Watson and Crick's model.
Answer
DNA has a double helix structure - two parallel threads of nucleotides coiled around each other, like a flexible ladder. Each strand is made of nucleotides containing nitrogenous bases (A, T, G, C), s…
What are the four types of nitrogenous bases in DNA and how are they classified?
Answer
The four nitrogenous bases are: Purines: Adenine (A) and Guanine (G) Pyrimidines: Cytosine (C) and Thymine (T) These bases always pair specifically: A with T, and C with G, forming the rungs of the DN…
+16 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Heredity and Variation for Maharashtra Board Class 9 Science?
How many flashcards are available for Heredity and Variation?
How should I revise Heredity and Variation for Class 9 exams?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Heredity and Variation
For serious students
Get the full Heredity and Variation chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Maharashtra Board Class 9 Science. Free to start, no card needed.