Sunday, April 21, 2013

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.

Find Least Common Multiple (LCM). 1) 5 and 15 = ...