Questions answers Reproduction class 10
Very Short Answer Type Questions:
- Which scientist is called the Father of Genetics?
- What was the topic of research for Mendel?
- What is monohybrid cross?
- During monohybrid cross by Mendel, was the ratio of tall plants to short plants in an F1 generation?
- What is phenotype?
- In a human male, which combination of chromosomes is present in the 23rd pair?
- What is prenatal sex determination test?
Fill in the blanks:
- Mendel selected …………..plants for his study.
- A ……….trait does not get expressed in F1 generation.
- The ………………trait gets expressed in most of the plants of F2 generation.
- ………………..is the biological name of a pea.
- The first law of Mendel is also called the law of ……………..
- A …………..sends a particular code for making a particular protein.
Write True/False for the following:
- Mendel’s discovery was rejected by his contemporary scientists.
- Darwin worked on the same topic as Mendel.
- Pea is an annual plant.
- Tallness is always a dominant trait than shortness.
- Any colour of flower can be a dominant trait.
- A woman is responsible for the gender of her child.
- The population of girls is less than that of boys in India.
Short Answer Type Questions:
- What is the Law of segregation?
- What is the difference between genotype and phenotype?
- A true-breeding plant with purple flower is crossed with a true breeding plant with a white flower. Make the Pinette square to show the progenies in an F2 generation if plants of F1 generation are allowed to self-pollinate.
Long Answer Type Questions:
- What is monohybrid cross? Explain the experiment by Mendel to show the results of a monohybrid cross.
- What is dihybrid cross? What happens in F1 and F2 generation when plants producing Round green (RRyy) seeds are crossed with Wrinkled Yellow (rrYY) seeds. Make a Punnett Square show the result in an F2 generation.
Multiple Choice Questions
- Who is called the Father of Genetics?
- a. Mendel
- b. Hugo de Vries
- c. Charles Darwin
- d. Lamarck
- If a plant producing red flowers is crossed with another plant producing white flowers, and the red colour is dominant then how many plants of F1 generation would produce red flowers?
- a. 25%
- b. 50%
- c. 80%
- d. 100%
- If a brown sheep mates with white sheep and brown colour is the dominant trait then how many sheep in the F2 generation shall have a brown coat?
- a. 25%
- b. 50%
- c. 75%
- d. 100%
- How many copies of the gene for a particular trait are present in a germ cell.
- A cat has white fur and blue eyes. Which of the following is true about the manifestation of fur colour and eye colour in subsequent generations?
- The cat with white fur will always have blue eyes
- A cat with white fur will never have blue eyes
- The cat with white fur may or may not have blue eyes
- A cat with white fur will always have hazel eyes
- What do you understand by pure breeding plants?
- A man having blood group A marries a girl with blood group O and their daughter’s blood group is O. Is this information enough to tell you which of the traits – the blood group A or O – is dominant? Why or why not? (NCERT)
Conservation of natural resources:
Human’s Eye and Colourful World