The sporophyte form of the protist U l v a a. produces gametes. b. contains haploid sperm. c. pr

step 1 Which of these is true of the sporophyte form of Ulva? Does it produce gametes? Does it contain

The sporophyte form of the protist U l v a a. produces...

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Key Concepts

Alternation of Generations

This is a life cycle found in many plants and some protists where the organism alternates between a diploid sporophyte phase and a haploid gametophyte phase. In this cycle, the sporophyte develops from the fusion of gametes (fertilization) and then produces spores that, after undergoing meiosis, give rise to the gametophyte stage.

Sporophyte Stage

The sporophyte is the diploid phase of the life cycle. It is the product of fertilization, meaning it comes from the union of two haploid gametes. The role of the sporophyte is to produce spores through meiosis, which then develop into the haploid gametophyte generation.

Meiosis

Meiosis is a type of cell division that reduces the chromosome number by half, converting the diploid cells of the sporophyte into haploid spores. This process introduces genetic variation and is critical in the transition between the diploid and haploid stages within the alternation of generations.

Gametes and Fertilization

Gametes are the haploid reproductive cells produced by the gametophyte phase of the life cycle. When gametes fuse during fertilization, they form a diploid zygote, which develops into the sporophyte. This process is fundamental to sexual reproduction in organisms exhibiting alternation of generations.

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