1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IrinaK [193]
1 year ago
11

. certain varieties of chrysanthemums contain 18, 36, 54, 72, and 90 chromosomes; all are multiples of a basic set of nine chrom

osomes. how would you describe these varieties genetically? what feature do the karyotypes of each variety share? a variety with 27 chromosomes has been discovered, but it is sterile. why?
Biology
1 answer:
charle [14.2K]1 year ago
5 0

The varieties of chrysanthemums containing all multiples of nine chromosomes are autopolyploids. Their karyotypes share the feature of an even number of basic haploid chromosome sets.  

Autopolyploids are described as the chromosome sets of an individual when more than two sets of chromosomes are present. They are specifically from the same specie. They can occur when pair of homologous chromosomes have not separated into different nuclei during meiosis. Since, during meiosis, the chromosome sets are separated equally thus karyotypes have an equal number of haploid chromosomes.

Organisms with 27 chromosomes are Triploids(3n) that are sterile because Trivalents at meiosis 1 would form a high number of unbalanced gametes to be formed.

Learn more about Polyploidy here brainly.com/question/24109109

#SPJ4

You might be interested in
Summarize the experiments performed by the following scientists that provided evidence that DNA is the genetic material: a. Fred
iragen [17]

Answer:

The following scientists have performed different experiments that were helpful in providing evidence that DNA is the genetic material. The summarize experiments are as follows-  

1.  Fredrick Griffith- the experiment was an experiment performed in 1928. It was one of the experiments that exhibit that bacteria can acquire through the process of transformation.

2 Oswald Avery, Maclyn McCarty, and Colin MacLeod: this experiment exhibited that DNA can transform the cell properties, and clarifying the chemical properties of the genes.

3. Alfred Hershey and Martha Chase: They determined that even the bacteriophage has a protective coat around it but the DNA that is present inside is the genetic material that has the ability to produce the progeny inside a bacterium.

4. Erwin Chargaff: He proposed tow rules which were named after him as chargaff rules. This tells that natural DNA the number of cytosines is equal to the number of guanine units and adenine to Thymine units.

4 0
3 years ago
The appendix is a vestigial organ. True or False
Natali5045456 [20]

Answer:

true

Explanation:

Appendix, earlier used to digest raw vegetable matter, is now a vestigial organ in human body and does-not perform any function.

3 0
2 years ago
How has nearly all the food we eat been "genetically modified" in the broadest sense of the term?
sveta [45]
In the broadest sense of the term, we have modified the genes of almost everything. We used selective breeding to breed the most resistant form of crops, the largest sized chickens, and others. In recent years we have even modified them through gene splicing and other methods. Nearly everything we eat, including including "organic" foods have been changed from their original DNA structure, in fact we do not even know anything's original genetic structure because of this. Genetic modification could also include mutations. Some crops have mutated due to pollution, disease, or other effects such as climate change. Without genetic modification our world would differ from what it looks like today.
3 0
3 years ago
Given that a mineral has three mutually perpendicular planes of cleavage and breaks into cubes, is the mineral mica, pyroxene, a
andriy [413]

Answer:

Halite

Explanation:

Halite, commonly known as rock salt, is a type of salt, the mineral form of sodium chloride. Halite forms isometric crystals

6 0
2 years ago
What is salivary gland? tell its functions.
katen-ka-za [31]

Answer:

Parotid glands are the largest salivary gland. Each gland is approximately 6 cm long and 3-4 cm wide and can weigh up to 30 grams. They are located within each of our cheeks. In our oral cavity they are responsible for the secretion of about 20% of saliva. This saliva is known as serous i.e. more liquid and fluid. It helps in the first phase of the digestion of food, facilitate mastication "chewing". These glands secrete protein-rich fluid which is a suspension of alpha-amylase enzyme.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Explain how the distribution of the similar rock types can be used as evidence for continental drift
    14·1 answer
  • What is the final product of metabolism in a red blood cells
    8·1 answer
  • Natural selection is the primary mechanism of
    8·1 answer
  • Which statement about the cell membrane is true?
    7·2 answers
  • Describe the key difference between the celsius scale and the kelvin scale
    15·1 answer
  • I need to know asap plz
    12·1 answer
  • Boone with out marrow<br> A. long bone <br> B. short bone​
    12·2 answers
  • What is the benefit of having carbohydrates in the form of glycogen?
    11·1 answer
  • 2 points
    13·1 answer
  • In an ecosystem, each trophic level receives energy from the level below it. What is the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!