(English Medium) ICSE Class 10 - CISCE Important Questions for Biology

A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?

The diagram given below represents a stage in mitosis.

1. Identify the stage given above.
2. Give one reason to support your answer in (a).
3. Mention the number of chromosomes given in the diagram.

The diagram given below represents a stage in mitosis.

1. Identify the stage given above.
2. Give one reason to support your answer in (a).
3. Mention the number of chromosomes given in the diagram.

A pair of corresponding chromosomes of the same shape, size and one from each parent is called ______.

Name the following:

The nitrogenous base that pairs with adenine.

Synthesis phase in the cell cycle is called so, because of the synthesis of more:
A. RNA
B. RNA and proteins
C. DNA
D. Glucose

State the exact location of the Centromere

Chromosomes get aligned at the centre of the cell during:
A. Metaphase
B. Anaphase
C. Prophase
D. Telophase

Name the sex chromosomes in human males and females

What is the number of chromosomes in the gametes of human beings?

Name the following:

The number of chromosomes present in a nerve cell of a human being.

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong

Centrosome.Cell wall, Cell membrane, Large vacuoles

Give appropriate biological or technical terms for the following :

The condition in which a pair of chromosomes carries similar alleles of a particular character.

 Expand the following biological abbreviations : 
 DNA 

Duplicated chromosomes are joined at a point termed ______.

Differentiate between genotype and phenotype.

The sex chromosome in a human ovum is ______.

A zygote which has Y chromosome inherited from the father will develop into a ______.

A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?

Given below is a schematic representation of the inheritance of the shape of the seeds of garden peas. Answer the questions that follow:

1. Which is the dominant and recessive allele of the trait?
2. What does the ratio 3 : 1 in the F₂ generation represent?
3. State Mendel's Law of Dominance.