Chapter 45: Problem 1

Diagram the general plant life cycle. Which stages are haploid and which are diploid? At which stage are gametes formed?

Short Answer

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The general plant life cycle alternates between haploid and diploid phases, with haploid gametophytes producing gametes through mitosis and diploid sporophytes producing spores through meiosis. The haploid stages consist of spores and gametophytes, while the diploid stages consist of the zygote and sporophyte. Gametes are formed during the haploid gametophyte stage.

Step by step solution

Understand the General Plant Life Cycle

The general plant life cycle consists of two alternating phases: the haploid gametophyte phase and the diploid sporophyte phase. The cycle begins with a haploid spore, which will eventually develop into a multicellular gametophyte. The gametophyte produces gametes (sperm and egg cells) through mitosis. These gametes unite during fertilization to form a diploid zygote. The zygote then develops into a multicellular sporophyte, which produces spores through meiosis, and the cycle continues.

Identify Haploid and Diploid Stages

In the general plant life cycle, the haploid stages are the spores and gametophytes, which have a single set of chromosomes. The diploid stages are the zygote and sporophyte, which have two sets of chromosomes.

Determine When Gametes are Formed

In the plant life cycle, gametes (sperm and egg cells) are formed during the haploid gametophyte stage. The gametophyte produces gametes through mitosis. These gametes will unite during fertilization, forming a diploid zygote.

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Diagram the general plant life cycle. Which stages are haploid and which are diploid? At which stage are gametes formed?

Short Answer

Step by step solution

Understand the General Plant Life Cycle

Identify Haploid and Diploid Stages

Determine When Gametes are Formed

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