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WorksheetsHEREDITY AND VARIATION ( IX )
Total questions: 24
Worksheet time: 2hrs 0mins
Every living thing has genetic information stored in the form of
Ribosomes
DNA
Chloroplast
Mitochondria
Sections of DNA that have instructions for a specific trait are called _______________
Blueprints
Genes
Heterozygous
Fragments
Chromosomes are
Found in the mitochondria
Made of 20 pairs
Long strands of DNA that contain many genes
Bundles of DNA that contain only one gene each
The passage of genetic instructions from one generation to the next is known as
Alleles
Ancestry
Heredity
Variation
The fine thread-like structure found in the nucleus of the cell are called
Centrioles
Chromosome
Genes
Centromeres
Chromosomes in the skin cells of a girl are
44+XX
22+Y
22+X
44+XY
Chromosomes in the liver cells of a baby boy are
44+XY
22+X
22+Y
44+XX
When two parents are crossed, the offspring are referred to as
Test cross
F1 Generation
Dominant
F2 Generation
The science of heredity is known as
Biology
Genetics
Biotechnology
Physiology
The visible characteristic in an organism is known as
prototype
stereotype
phenotype
Genotype
The sex of a child is determined by which of the following?
the length of the mother's pregnancy
the presence of a Y chromosome in a sperm
the length of time between ovulation
none of them
If the ratio of each phenotype of the seeds of pea plants in the F2 generation is 9 : 3 : 3 : 1, it is known as
monohybrid ratio
Dihybrid ratio
Tri hybrid ratio
Tetra hybrid ratio
Which of the following is not controlled by genes?
Eye colour
Height
Hair colour
all of them
The phenotypic ratio of dihybrid cross is
1:1
3:1
9:3:3:1
1:3
46+1 ,trisomy of the 21st chromosome
down syndrome
turner syndrome
klinfelter syndrome
sickle cell anaemia
44+X ,monosomy of X chromosome.
down syndrome
turner syndrome
klinfelter syndrome
sickle cell anaemia
44+XXY ,monosomy of X chromosome.
down syndrome
turner syndrome
klinfelter syndrome
sickle cell anaemia
It is a monogenic disorder .
down syndrome
turner syndrome
klinfelter syndrome
sickle cell anaemia
Pick the odd one out ( hint: It is a mitochondrial inherited disease )
Leber hereditary
cystic fibrosis
night blindness
albinism
Draw how you feel today happy/sad/angry/anxious etc.
write the four types of chromosomes according to their order
red/blue/green/yellow
Metacentric/
telocentric/
acrocentric/
sub-metacentric.
sub-metacentric/
Metacentric/
telocentric/
acrocentric
telocentric/
Metacentric/
acrocentric/
sub-metacentric.
telocentric/
acrocentric/
Metacentric/
sub-metacentric.
Sex chromosomes is also known as
allosomes
Autosomes
Draw and label A chromosome.
If the pair consists of similar chromosomes by shape and organization, they are called ________ chromosomes.
Homologous
Heterologous
