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
defon
3 years ago
7

Wild diploid wheat has seven chromosomes in its pollen. Discuss the major events that had to occur for tetraploid pasta wheat to

have evolved. Describe the genome and fertility of pasta wheat (number and kinds of chromosomes).
Biology
1 answer:
lianna [129]3 years ago
5 0

Answer:

Tetraploid wheat evolved by allopolyploidization and subsequent diploid-like behavior due to cytological diploidization

Explanation:

Durum wheat (<em>Triticum durum</em>) or pasta wheat, is a tetraploid wheat species that has 28 chromosomes, i.e., seven pairs in each genome (2n = 4x = 28). Durum wheat was domesticated from wild emmer wheat, which originated by hybridization of two diploid wheat species with 14 chromosomes: <em>Triticum monococcum</em> (genome AA) and one wild progenitor (genome BB). <em>Triticum durum </em>is a typical example of evolution by hybridization and polyploidization, where the resultant tetraploid species has two complete sets of chromosomes. Allopolyploidization is one of the most common types of plant speciation. During meiosis, 28 chromosomes form 14 homologous chromosome pairs, because homologous chromosomes have developed 'restriction of pairing' (i.e., cytological diploidization). The restriction of pairing to fully homologous chromosomes ensures a correct meiotic behavior, which otherwise would be altered due to the high level of homology that still exists among chromosomes from different wheat progenitors.

You might be interested in
How does the resulting cell at the end of asexual reproduction compare to the original cell from the beginning of asexual reprod
egoroff_w [7]
Asexual reproduction = Binary Fission = Mitosis
The cell at the end of asexual reproduction compare to the original cell: at the end is called daughter cell, at beginning is parent cell; both have same number of chromosomes (2n = diploid).
3 0
3 years ago
Read 2 more answers
The visible light spectrum is usually said to consist of red, orange, yellow, green, blue, indigo, and violet. All of these colo
Alex777 [14]

Answer:

c

Explanation:

5 0
3 years ago
What are the two types of minerals?
ycow [4]

Macrominerals and trace minerals.

8 0
3 years ago
Read 2 more answers
What is required to begin asexual reproduction?
Maru [420]
Hi

This question is also B

Hoped I Helped
4 0
3 years ago
Read 2 more answers
Which of the following is true about the cells of an animal’s body?
azamat

Answer:

D

Explanation:

5 0
3 years ago
Other questions:
  • In a hydrolysis reaction, ___________. I this process, water is ___________.
    13·1 answer
  • 1.) The train is averaging 45mph.
    6·1 answer
  • A friend says that the temperature increases as altitude increases because you're moving closer to the sun is this true explain
    8·1 answer
  • Some cancers are caused by mutations that stop certain proteins from working. The inactivation of whát kind or protein could lea
    5·1 answer
  • Which two scientists determined that all living things are composed of cells?
    13·2 answers
  • Which statement is true? a. tissues are made up of organs b. body systems are made up of organs. c specialized cells are made up
    6·2 answers
  • Why do traits that give an organism a disadvantage exist during meiosis? Please be as descriptive as possible and write it in yo
    7·1 answer
  • Someone pls help me ill give out brainliest pls don’t answer if you don’t know
    9·1 answer
  • Question 4 of 10
    11·2 answers
  • Margo is designing an experiment to investigate the rock cycle. She has written the following steps.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!