All of the following are correct about alternation of...

Name: Problem 16, Chapter 5: SAT Biology E/M
Uploaded: 2020-10-14T16:41:55-08:00
Duration: 2 min 34 s
Channel: Jennifer Smith
Description: All of the following are correct about alternation of generations EXCEPT (A) in ferns, the sporophyte is dominant (B) the sporophyte is diploid (C) in flowering plants, the gametophyte is dominant (D) the gametophyte is haploid (E) like all plants, bryophytes show alternations of generations

All of the following are correct about alternation of generations EXCEPT (A) in ferns, the sporophyte is dominant (B) the sporophyte is diploid (C) in flowering plants, the gametophyte is dominant (D) the gametophyte is haploid (E) like all plants, bryophytes show alternations of generations

All of the following are correct about alternation of generations EXCEPT
(A) in ferns, the sporophyte is dominant
(B) the sporophyte is diploid
(C) in flowering plants, the gametophyte is dominant
(D) the gametophyte is haploid
(E) like all plants, bryophytes show alternations of generations

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Key Concepts

Ploidy

Ploidy refers to the number of sets of chromosomes in a cell. In the context of plant life cycles, the sporophyte is diploid (2 sets of chromosomes) and the gametophyte is haploid (1 set of chromosomes). Understanding ploidy is key to distinguishing the functions and characteristics of each generation in alternation of generations.

Gametophyte Stage

This is the haploid phase of the plant life cycle that develops from spores produced by the sporophyte. The gametophyte stage is responsible for producing gametes via mitosis, which will fuse to form the diploid sporophyte. In most higher plants, including flowering plants, the gametophyte is greatly reduced in size and not the dominant stage.

Alternation of Generations

This is a fundamental life cycle in plants where two distinct multicellular stages exist: a diploid sporophyte stage and a haploid gametophyte stage. It describes the alternation between these two generations within the lifecycle of the organism.

Sporophyte Stage

This is the diploid phase in the plant life cycle that arises from the fusion of gametes and subsequently produces haploid spores through meiosis. In many plants, such as ferns and flowering plants, the sporophyte is the dominant and visible generation.

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