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In a plant that conformed to the ABC model of floral development, what would be the most likely consequence of a mutation that disabled the B genes?

The plant would not flowers

The plant would flower but the stamens and carpels would be missing

The plant would flower but the stamens and carpels would be replaced by petals

The plant would flower but would have 2 whorls of sepals surrounding 2 whorls of carpels

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Tod Thiel
Tod ThielLv2
28 Sep 2019

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Related questions

Plant Reproduction

Flowering plants are the most evolutionarily successful group of plants. Most of the plants that the average person sees in a day are flowering plants. Grass, broadleaf trees, and shrubs are all flowering plants. One of the keys to the extraordinary success of flowering plants is the fruit.

a. Popular culture classifies green bell peppers as vegetables. You put them in your chili, right, not in a pie?! you know that they are actually fruits and not vegetables. Give a scientific explanation of a fruit, and, consequently, how you know that a green bell pepper is a fruit, contrasting it to what you know to be vegetables, like kale and carrots and celery.

b. Fruits cannot happen without flowers. Explain the relationship between fruits and flowers. As a part of your answer, explain how fruits develop, from inception to completion. Be sure to incorporate the appropriate floral structures, what they contribute to plant reproduction, and how they are related to their respective seed/fruit parts.

c. Not all flowers are the same (they have differences in color, shape, odor, etc). Explain why this is true. As a part of your answer, explain the true “purpose” of a flower, give examples of flowers, use the appropriate names for the parts of a flower that contribute to this purpose, and include the concept of co-evolution between the flower and the main audience for the flower.

1. A plant the lacks petals and has well-developed anthers ismost likely

pollinated by fruit-eatingmammals.
pollinated by bees.
pollinated by birds.

pollinated by wind.

2. SELECT EACH TYPE of tissue that may be found in a maturefruit or seed. Can be more than one

Diploid sporophyte tissue from theprevious generation
Triploid endosperm
Diploid embryonic tissue
Haploid sperm cells

Tissue from the female gametophyte

3. Based on the outcome for plants, a monkey eating a banana isa

parasite.
pollinator.
disperser.

fertilizer.

4. Select all of the environmentswhere seeds would be an advantage over spores. Can be more thanone

Deserts
Areas with unpredictablerainfall
Wet humid swamps
Open habitats with sparsevegetation

Under a dense forest canopy

5. Select all the advantages that seeds have over spores.

Seeds have increased droughtresistance.
Long term dormancy ispossible.
Sexual reproduction is onlypossible with seeds.
Nutrition is packaged with theembryo.

Widespread dispersal is possible with a seed coat.

6. Nectar is a sugar-laden liquid that is very energeticallyexpensive to produce. Why do plants allocate resources to produceit instead of just producing more flowers?

Nectar serves as an enticement forinsects.
Nectar is sticky and traps windborne pollen.
Nectar provides nutrition to thedeveloping embryo.

Nectar provides energy during pollen tube formation.

7.The dried pericarp that forms the peanut shell provideevidence that peanuts are

legumes.
drupes.
samaras.

pomes.


8. All members of the Anthophyta have

nectaries.
animal pollinators.
scented flowers.
ovules enclosed in carpels.

fleshy fruits for dispersal.

9. Why is external water not essential for fertilization in seedplants?

Ovules are contained within thepollen.
Sperm cells are used to transportpollen to the archegonia.
Seed plants use pollen instead ofsperm for fertilization.
The sperm cells in seed plants arecapable of resisting desiccation.

Pollen grains are transported by wind or an animal.

10.Select the true statements concerning seeds. Can be more thanone

Seeds allow for dormancy untilfavorable conditions arise.
The fruit provides nutrition to thedeveloping embryo.
The ovule dries and forms the seedcoat.
The seed stores all of thenutrition and water the embryo needs to germinate.
Seeds can resist conditions thatwould kill a live plant.

Seeds are key to wide dispersal of offspring.

11. Select the true statements concerning sperm and pollen. Canbe more than one.

In seed plants the entire malegametophyte is dispersed.
The pollen fertilizes the egg.
The pollen tube facilitates thepollination of the ovule.
Pollen transports the cells thatform the sperm but only the sperm fertilizes the egg.

Unlike mosses and ferns water is not needed for fertilization inseed plants.

12.Check which of the following are correct regarding thebenefit of seeds. Can be more than one.

Seeds protect the young embryo byenclosing it in several layers of gametophyte tissue.
Seeds provide a source ofnourishment to the embryonic plant.
The integument forms a seed coatthat protects against desiccation.
Seeds provide a structure in whicha dormant embryo can avoid unfavorable growing conditions andgerminate when conditions improve.

Seeds are a means to transport offspring away from the parentalplant.

13. A fruit-bearing dioecious flower would have

a gynoecium.
neither an androecium nor agynoecium.
an androecium.

both an androecium and a gynoecium.

14. A researcher brings a sample of dry soil to the lab, wetsit, provides ample amounts of fertilizer, and places the soil in acontainer in a greenhouse. Which type of plant would be leastlikely to emerge?

Corn
Sunflower
Liverwort
Wheat
Pine seedling

Suppose that red flower color (A/A or A/a) is dominant to white flower color (a/a) in petunias. The common allele (A) encodes the red pigment for petal colour. The rare allele (a) encodes a nonsense mutation in the pigment gene, so no pigment is produced (such that petals are not coloured and appear white). Among the petunias in a greenhouse population, 480 are A/A and 90 are A/a. There are no white-flowered petunias observed. Is this population of petunias in genetic equilibrium? Show all of your steps and calculations clearly (including use of a χ 2 test) and write a brief (2-3 sentence) conclusion about whether this population of petunias is in Hardy–Weinberg equilibrium. Make sure the expected genotype frequencies equal to 1

You have selected a petunia plant from the greenhouse with red flowers and want to determine whether the plant is A/A or A/a.

a) What kind of experiment (what kind of cross) could you perform to determine the genotype of the selected petunia plant? Explain briefly.

b) How will the cross in (a) help you determine the genotype of your red-flowered petunia? That is, explain how will the results from this cross differ if the red-flowered petunia is A/A versus A/a?

c) You end up choosing two red plants that are both of the genotype A/a and you cross them. If the cross produces six plants, what is the probability that four of them will be white and two will be red?

MY ANSWERS SO FAR

Allele frequency of p= 1/2 (2pq)+ p2

P= 1/2 (0.1578) + 0.8421

=0.921

Allele frequency of q = 1/2 (2pq) + q2

= 1/2 (0.1578) + 0.0

= 0.0789

Expected genotype of the population:

AA(p2)= 0.848 aa (q2)= 0.006

(2pq)Aa =0.0105

I'm confused as to why this doesn't total upto 1

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