Download N5- Unit 1 MO4- Reproduction, variation, inheritance Sexual

N5- Unit 1
MO4- Reproduction, variation, inheritance
Sexual reproduction in animals
1-What is the biological name given to Gametes
sex cells?
2-Meaning of haploid?
A cell which nucleus contains only 1 set of
chromosomes. In animals, only gametes are
haploid.
3-Biological name of an organ
Gonad
producing sex cells?
4-Male gamete
- name
- sperm
- features
- has head and tail section and many
mitochondrion
- site of production
- testes
5-Female gamete
- name
- egg or ovum
- features
- has a large store of food in its cytoplasm
- site of production
- ovaries
6-Identify the main parts of the male
reproductive system.
1- Penis: allows internal fertilisation
2- Sperm duct: carries sperm from testes
to penis
3- Testes: male gonad where sperm is
produced.
7-Identify the main parts of the
female reproductive system.
1- Ovary: female gonad: produces and
releases eggs.
2- Oviduct: collects egg and push it toward
uterus with the beating of hair-like cilia.
3- Uterus: where the egg implants and
develops
4- Vagina: where sperm is deposited
8-What is fertilization?
9-Where does fertilization take place
in land animals?
It is the fusion of the sperm nucleus with
the egg nucleus.
In the oviduct of the female reproductive
system.
10-Where does fertilization take
place in fish?
11-What is a zygote?
Sexual reproduction in Plants
12-Identify and describe the function
of the parts of a flower
13- What is pollination?
13- Describe the growth of the pollen
tube and the fusion of gametes.
In the water, it is external fertilisation
(outside of the body as the eggs are
deposited before being coated with
sperm)
The first diploid cell after fusion of the
haploid gametes.
1- Anther: produce male gamete (sex cell)
2- Stigma: sticky platform on which pollen is
deposited.
3- ovary: produces ovule containing female
gamete
4- Nectary: produce nectar (sugary liquid to
attract pollinator)
5 - Petal: attract pollinators + protection of
sexual organs
When a pollen grain is transferred from an
anther to a stigma.
After landing on the stigma, the pollen grain
germinates, i.e. it grows a pollen tube which
eventually reaches the ovule. The male
gamete travels down the pollen tube to fuse
with the female gamete to form the zygote
(Fertilisation)