Practise reproduction and inheritance using flower diagrams, hormone roles, fertilisation scenarios, germination investigations and inheritance data.
The diagram shows a flower with some structures labelled.
Which structure is the style?
P
Q
S
T
Which structure releases pollen?
P
R
T
U
On which structure do the pollen grains germinate?
P
R
S
U
This flower is insect-pollinated.
Describe how structures P, R and T would be different in a wind-pollinated flower.
P
R
T
Flowering plants can reproduce asexually.
Give an example of a natural method of asexual reproduction in plants.
Give an example of an artificial method of asexual reproduction in plants.
Give three differences between asexual and sexual reproduction.
1
2
3
Inheritance involves genomes, genes and alleles.
State what is meant by the term genome.
Explain the difference between a gene and an allele.
In horses, black hair is caused by a dominant allele, B . The recessive allele, b, codes for brown hair.
A heterozygous black-haired male horse breeds with a heterozygous black-haired female horse.
Draw a genetic diagram to show the genotypes of the parents, the gametes they can produce and the genotypes and ratio of phenotypes of their possible offspring.
Calculate the probability that the first offspring will be male and have black hair.
probability =
In horses, eye colour is also controlled by a single gene with two alleles.
The dominant allele causes brown eyes and the recessive allele codes for blue eyes.
A farmer has a male horse with brown eyes.
Explain how the farmer could determine the genotype of this male horse.
The diagram shows the human female reproductive system.
Which label shows where ovulation occurs?
Which label shows where fertilisation usually occurs?
The diagram shows the changes in thickness of the uterus lining and levels of two hormones produced by the ovary during a menstrual cycle.
Hormones X and Y are produced by the ovaries.
Name X and Y.
X
Y
Explain the function of hormone X during the menstrual cycle.
The diagram shows a human fetus developing in the uterus.
Explain how the structure of the placenta enables the efficient exchange of substances between the fetus and the mother.
An Amoeba is a microscopic single-celled organism that lives in pond water.
The diagram shows an Amoeba with some structures labelled.
Which structure contains chromosomes?
P
Q
R
S