Grade 9 Reproduction worksheet
from Gradelings · Name: ______________________
How to explain it
- Asexual reproduction makes offspring from one parent; they are identical to it.
- Sexual reproduction joins an egg and a sperm from two parents, so offspring get a new mix of genes.
- In a flower, the stamen makes pollen and the pistil holds the eggs.
Example: A potato sprouts a new plant from its eye. Asexual or sexual reproduction? Only one parent is involved. No egg or sperm joins. Answer: asexual
Question 1
Asexual or sexual reproduction? Sort each example.
Sort into: 1️⃣ Asexual · 2️⃣ Sexual
- 🐝a bee carries pollen to an apple flower
- 🪸a hydra grows a bud
- 🌻a seed grows from a pollinated flower
- 🐦a bird lays fertilized eggs
- 🪴a spider plant sends out a plantlet
- 🦠bacteria split in two
- 🥔a potato eye grows into a new plant
- 🐟a salmon's egg is fertilized by a sperm
1️⃣ Asexual: a hydra grows a bud, a spider plant sends out a plantlet, bacteria split in two, a potato eye grows into a new plant · 2️⃣ Sexual: a bee carries pollen to an apple flower, a seed grows from a pollinated flower, a bird lays fertilized eggs, a salmon's egg is fertilized by a sperm
Hint: Asexual reproduction involves one parent and produces identical copies. Sexual reproduction joins sex cells from two parents.
Question 2
Budding in yeast and hydra is a type of…
- fertilization
- asexual reproduction
- photosynthesis
- sexual reproduction
asexual reproduction
Hint: A bud grows off the parent and breaks off as a new organism.
Question 3
In plants, what are the male parts of a flower called (together)?
- stamens
- petals
- pistils
- sepals
stamens
Hint: Stamens (anther + filament) make pollen. The pistil is the female part.
Question 4
Why does sexual reproduction increase variety within a species?
- Parents choose which genes to pass on.
- Mutations never happen.
- Offspring are copies of one parent.
- Offspring get a new mix of genes from two parents.
Offspring get a new mix of genes from two parents.
Hint: Variation helps a species survive when conditions change.
Question 5
Which is a way flowering plants reproduce sexually?
- A leaf grows into a new plant
- A branch is cut and planted
- A tuber sprouts
- Pollen from one flower fertilizes another flower's ovule
Pollen from one flower fertilizes another flower's ovule
Hint: Pollination moves pollen to the female part of a flower so seeds can form.
Question 6
What is asexual reproduction?
- Making offspring from two parents
- Making offspring without cells
- Making offspring from one parent
- Making offspring from eggs only
Making offspring from one parent
Hint: Asexual reproduction needs only one parent, and the offspring are genetically identical.
Question 7
Meiosis is the type of cell division that produces…
- two identical nuclei
- new organelles
- gametes with half the usual number of chromosomes
- identical body cells
gametes with half the usual number of chromosomes
Hint: Gametes have half the chromosomes so that fertilization restores the full number.
Question 8
What is fertilization?
- When a plant makes sugar
- When a seed is planted
- When a cell divides in two
- When a sperm cell and an egg cell join
When a sperm cell and an egg cell join
Hint: Fertilization combines genetic material from two parents into a new cell.
Question 9
Which is an example of asexual reproduction?
- A strawberry plant growing a runner
- A bird laying eggs after mating
- A frog laying eggs that are fertilized
- A human baby being born
A strawberry plant growing a runner
Hint: Runners grow new plants from the parent without seeds or a second parent.
Question 10
Offspring from asexual reproduction are…
- always female
- a mix of two parents' genes
- completely different from the parent
- genetically identical to the parent
genetically identical to the parent
Hint: One parent's cells copy themselves, so the genes are the same.
Answer key
- 1. 1️⃣ Asexual: a hydra grows a bud, a spider plant sends out a plantlet, bacteria split in two, a potato eye grows into a new plant · 2️⃣ Sexual: a bee carries pollen to an apple flower, a seed grows from a pollinated flower, a bird lays fertilized eggs, a salmon's egg is fertilized by a sperm
- 2. asexual reproduction
- 3. stamens
- 4. Offspring get a new mix of genes from two parents.
- 5. Pollen from one flower fertilizes another flower's ovule
- 6. Making offspring from one parent
- 7. gametes with half the usual number of chromosomes
- 8. When a sperm cell and an egg cell join
- 9. A strawberry plant growing a runner
- 10. genetically identical to the parent
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