Study guide: Types of Reproduction

📋 Course Outline

1. Sexual Reproduction and Hybrids
2. Gametes and Inherited Variation
3. Gametes Across Organisms

📖 1. Sexual Reproduction and Hybrids

🔑 Key Concepts & Definitions

• Sexual reproduction: Occurs when two organisms breed and produce new organisms.
• Hybrids: Offspring produced when organisms of two different species reproduce; they cannot reproduce sexually and are not fertile.

★ Must-know

📌 Members of the same species can reproduce sexually and produce offspring that can also reproduce sexually.

Further detail

• A plumcot is the fruit from a hybrid of a plum tree and an apricot tree.

💡 Memory Hook

Same-species offspring can reproduce; hybrid offspring are usually infertile.

📖 2. Gametes and Inherited Variation

🔑 Key Concepts & Definitions

• Inherited variation: Variation in characteristics that offspring inherit from their parents.

★ Must-know

• Gametes carry the instructions for making a new organism, and each gamete made by a parent contains slightly different instructions for characteristics.

• A male gamete and a female gamete join to form a fertilised egg cell, or zygote.

Further detail

• Sexual reproduction produces offspring that do not look identical to their parents and have some characteristics from each parent.

• In humans, males produce sperm gametes and females produce egg gametes.

💡 Memory Hook

Different gamete instructions → offspring vary.

📖 3. Gametes Across Organisms

📝 Essential Points

• The male gametes of mosses and ferns are swimming sperm cells.

• The male gametes of flowering plants and conifers cannot swim and are found inside pollen grains.

💡 Memory Hook

Moss and fern sperm swim; flowering-plant and conifer gametes travel in pollen.