Genetics Mcq's Questions class 10

Genetics-  Test

Q1. How is it possible for brown eyed parents to have a blue eyed child. Which law does it illustrate?

Q2. Give two differences of the following

a)     Monohybrid cross and Dihybrid corss

b)    Gene and Allele

Q3. Explain law of Dominance?

Q4. Fill the blanks

a)     On the basis of the position of the centromeres, the chromosomes may be ________,____________,_________ and __________.

b)    The diploid number in humans is ____________.

c)     Chromosomes are made of ___________

d)    DNA is composed of _________and __________

e)     Meiosis occurs in ____________cells only.

f)      __________is surrounded by radiating aster rays

g)     In ___________phase chromosomes becomes  aligned to equator

h)    Chromosomes gets transformed into a chromatic network in ________phase.

i)       _________is the resting phase between two cell divisions

j)       ___________is known as division of cytoplasm

k)     _________and ________are sex linked diseases

l)       Dihybrid ration of phenotypic F2 generation is ___________

m)  A nucleotide is composed of _______, ________ and __________

n)    During meiosis the chromosomes duplication is followed by ____ nuclear divisions.

o)    The  base pairs are found in DNA are ________, _________and ____________

Q5.Define the following

a)     Homozygous gene     b) Phenotype   c) Hybrid    d) Like begets like

Q6.Predict the Genotype and Phenotype of the following

a)     When one parent is homozygous black (BB) and other is homozygous brown(bb).

b)    When one parent is heterozygous black(Bb) and other is homozygous brown(bb).

Q7. Why recessive genes show up later during F2 generation?

Q8. Why did mendel chose garden pea for his experiments?

Q9. Give F2 generation of Tall Red (TTRR) and dwarf white (ttrr) flower?

Q10. Choose the odd one out?

a)     Metaphase ,  interphase, prophase, anaphase, Telophase

b)    DNA, Nucleosomes, Genes, Nitrogenous Base, Ribosomes

Q11. Give 3 differences between

a)     Mitosis and Meiosis

b)    Cell division in Animal and Plants

Q12 Give one word for the following

a)     Sudden change in one or more genes or in the number of chromosomes

b)    Small differences between individuals due to inheritance

c)     The suppressed allele

d)    Chromosomes other than the pair of sex chromosomes

e)     Same number of chromosome pairs maintained in daughter cells

                              MCQ’s

A.  Alternative forms of a gene are called _____________.

1.	loci
2.	multiples
3.	chromosomes
4.	alleles

B. Which of these is homozygous recessive?

1.	Ss
2.	ss
3.	SS
4.	s

C. What will be the genotypic ratio of the cross between Rr and rr?

1.	1:2:1
2.	3:1
3.	1:1
4.	1:1:1

D. The component of a chromosome that controls heredity is ____.

1.	proteins
2.	histones
3.	DNA
4.	RNA

F. Homologous chromosomes which are similar in both the sexes are called ______.

1.	sex chromosomes
2.	autosomes
3.	allosomes
4.	androsomes

G What type of bond connects base pairs?

A. Covalent bond

B. Ionic bond

C. Hydrogen bond

H.What does the term genome refer to?

A. All of the proteins expressed in an organism

B. The complete set of information in an organism's DNA

C. The set of genes turned on in an organism, tissue, or cell

I.  The structure that allows each duplicated eucaryotic chromosome to be pulled into a daughter cell is called a:

 A. centromere.

B. telomere.

C. mitotic spindle.

D. histone.

J.  The complex of DNA and protein in chromosomes is called: 

A. centromeres.

B. histone.

C. centrosome.

D. chromatin.

Tissues class 9th

(Q.)Which tissue makes up the husk of coconut?

 (Ans)  Sclerenchyma (fibres)

(Q.)What is middle lamella?

 (Ans)  Wall between adjacent plant cells is known as middle lamella.

(Q.)Write two functions of stomata? 

 (Ans)  (i) Gaseous exchange (ii) Transpiration

(Q.)Name the tissue in which the matrix is not produced by the cells present in it.

(Ans)  Blood

(Q.)What is the unique property of sieve tubes?

(Ans)  Perforated walls.

(Q.)Write a brief note on muscle tissue?

 (Ans)  Muscle tissue consists of elongated cells called muscle fibres which have the ability to contract and relax. These are made up of special contractile proteins. Muscle tissues are responsible for the movement in our body.

(Q.)What is the function of collenchyma in plants?

(Ans)  Collenchyma allows flexibility in plants and easy bending in various parts of the plants without breaking. It also provides mechanical support to plants.

(Q.)What is the function of epidermis in plants?

(Ans)  It protects all the parts of the plant. Epidermal cells on the aerial parts of the plant secrete a waxy, water-resistant layer on their outer surface which aids in protection against loss of water, mechanical injury and invasion by parasitic fungi.

(Q.)What are the properties of xylem tracheids and vessels?

(Ans)  Xylem tracheids and vessels are dead cells and have lignified walls. In addition to conduction, these tissues serve to conduct water and also provide support.

(Q.)What is the function of xylem parenchyma and xylem fibres?

(Ans)  Xylem parenchyma stores food and helps in the sideways conduction of water while xylem fibres are mainly supportive in function.

(Q.)Where is cuboidal epithelium located?

(Ans)  Cuboidal epithelium is located in the glands and in the lining of the kidney tubules as well as in the ducts of the glands.

(Q.)What are the different types of epithelial tissue?

(Ans)  Squamous epithelium, cuboidal epithelium, columnar epithelium, ciliated epithelium,stratified, pseudostratified and glandular epithelium.

(Q.)What is the function of columnar epithelium in respiratory tract?

(Ans)  In the respiratory tract, the columnar epithelial tissue has cilia, which are hair-like projections on the outer surfaces of epithelial cells. These cilia move and their movement pushes the mucus forward to clear it.

(Q.)Write the function of areolar tissue.

(Ans)  It fills the space inside the organs, supports internal organs and helps in repair of tissues.

(Q.)What is the property of cartilage?

(Ans)  Cartilage has widely spaced cells called chondrocytes. Its solid matrix is composed of chondoitin . It provides support and flexibility to various structures like joints.

(Q.)Write the properties of voluntary muscles.

(Ans)  These muscles are made up of muscle fibres which are multinucleated, cylindrical and unbranched cells with light and dark bands (striations). These are under voluntary control and are associated with the skeletal system.

(Q.)Why cardiac muscles are unique?

(Ans)  These are uninucleated, cylindrical, branched cells with light and dark bands. These are present in heart and show rhythmic contraction and relaxation throughout life.

(Q.)What are neurons?

(Ans)
Neurons are the basic unit of the nervous system and consists of a cell body, a long axon and many short branches called dendrites. These help in transmission of signals within the body.