WorksheetsBiology 3
Total questions: 20
Worksheet time: 37mins
Diagram shows a DNA molecular structure. X is basic unit of inheritance. What is X?
Nucleotide
Chromosome
Gene
Trait
Diagram 2 shows the punnett square used to determine the F1 generation when two tall plants were crossed. What is the percentage of tall plants obtained?
100%
75%
50%
25%
Ahmad has antibody anti-A and anti-B in his blood plasma. Which blood group is suitable for him during blood transfusion?
Blood group A
Blood group B
Blood group AB
Blood group.O
Diagram shows a pair of homologous chromosome. What T,t?
Homozygous alleles
Heterozygous alleles
Characteristics
Trait
A woman heterozygous for Rhesus + married a man with Rhesus - bliid. What is the probability to get a Rhesus + child?
1.00
0.50
0.25
0.01
Ali has blood group B and his brother has blood group O. Which are the possible genotype of the parents?
|A |B and |A |O
|A |B and |O |O
|A |A and |B |O
|A |B and |B |O
Garden pea plant P id crossed with Q plant that is heterozygous 7(RrYy) for both traits.
key
🔴Dominant allele for round seed
🔴Ressesive allele for wrinkled seeds
🔴Dominant allele for yellow seed
🔴Recessive allele for green seed.
Ehat are the possible genotype for the gamete produced by Q?
Rr and Yy
RY and ry
Rr, Yy, RY and ry
RY, Rr, rY and ry
Diagram 4 shows a schematic diagram of sex inheritance. What is the possible number if chromosome in P, Q and R?
P = 44+XX
Q = 44+XY
R = 44+XX
P = 44+XY
Q = 44+Y
R = 44+X
P = 44+XY
Q = 44+X
R = 44+X
P = 22+XY
Q = 22+Y
R = 22+X
What is the number if chromosome in an individual with Down's syndrome?
45
46
47
48
Diagram 5 shows a schematuc diagram of a monohybrid cross in mice. If H represents the dominant allele for black fur and h represents the recessive allele for grey fur, what are the genotypes of the parents?
HH x Hh
HH x hh
Hh x Hh
Hh x Hh
What is the structure?
Nucleotide
DNA
Chromosome
Protein
Which cell can generate replacement for white bliid cells?
Stem cell
White blood cell
Somatic cell
Gamete cell
Which of the following characteristic represents discontinuous variation?
Type of blood group
Height
Body weight
Skin colour
Which ig the following variations is caused by genetic factors only?
Ability to roll tongue
Height
Intelligemce
Skin colour
What is the factor that causes this variation?
Environment
Genetics
Genetic and environment
Nutrition
Which of the following substances are mutagens?
I)Infrared rays
II)Formaldehyed
III)Gamma rays
IV)Carbon monoxide
I & II
I & III
II & III
III & IV
Diagram 2 shows a type of chromosomal mutation. What type of mutation is this?
Deletion
Inversion
Duplication
Translocation
The population of grey coloured mothis more than the white coloured moth. What is the advantage of the variation of colour to its survival?
Can protect themselves from predators
To attract mate for breeding
Can adapt better to polluted environment
Can survive in different habitat
Diagram shows the bar charts of variation in humans. Which of the following characteristics represented by the above bar chart?
Type of blood group
Height
Body weight
Skin colour
Which of the following represents continuous variation?
Height
Earlobe
Thumb
Tongue roll
