The diagram shown below is the longitudinal section of a testis of man. Study it
carefully and answer the questions that follow:
Draw a neat, labelled diagram of a sperm.
Sperm:
Give biological reasons for the following statements:
Some women have facial hair like heard and moustache.
Give biological reasons for the following statements:
Cutting of trees should be discouraged.
Give biological reasons for the following statements:
In some xerophytes leaves are modified into spines.
Give biological reasons for the following statements:
There is frequent urination in winter than in summer.
Give biological reasons for the following statements:
The left ventricle of the heart has a thicker wall than the right ventricle.
In a homozygous pea plant, axial flowers (A) are dominant over terminal
flowers (a).
What is the phenotype and genotype of the F1 generation if a plant bearing
pure axial flowers is crossed with a plant bearing pure terminal flowers?
In a homozygous pea plant, axial flowers (A) are dominant over terminal flowers (a).
Draw a Punnett square board to show the gametes and offsprings when both the parent plants are heterozygous for axial flowers.
In a homozygous pea plant, axial flowers (A) are dominant over terminal
flowers (a).
What is the phenotypic ratio and genotypic ratio of the above cross shown
in (ii)?
In a homozygous pea plant, axial flowers (A) are dominant over terminal
flowers (a).
State Mendel’s Law of Dominance.