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
WINSTONCH [101]
3 years ago
7

Assume that three loci, each with two alleles (A and a, B and b, C and c), determine the differences in height between two homoz

ygous strains of a plant. These genes are additive and equal in their effects on plant height. One strain (aa bb cc) is 10 cm in height. The other strain (AA BB CC) is 22 cm in height. The two strains are crossed, and the resulting F1 are interbred to produce F2 progeny. Give the phenotypes and the expected proportions of the F2 progeny.
Biology
2 answers:
Oduvanchick [21]3 years ago
6 0

Answer:

Given,

aabbcc = 10 cm

AABBCC = 22 cm

The genes are additive which means that each dominant allele will contribute to the overall height. The base minimum height is 10 cm (no dominant allele) and the maximum height is 22 cm (all six dominant alleles). Thus, six dominant alleles contribute 12 cm of height to the base height, which means that each dominant allele adds 2 cm of height.

When, aabbcc X AABBCC :

AaBbCc ( F1 )

When, AaBbCc X AaBbCc :

7 types of phenotype is possible. They are:

6 dominant alleles = 22 cm

5 dominant alleles = 20 cm

4 dominant alleles = 18 cm

3 dominant alleles = 16 cm

2 dominant alleles = 14 cm

1 dominant allele = 12 cm

0 dominant allele = 10 cm

They will be in the ratio = 1 : 6 : 15 : 20 : 15 : 6 : 1 as given by the ratio of additive effect governing three loci. The intermediate phenotype ( 16 cm ) will be maximum in number and the numbers will decrease as we move to the extremes.

IgorC [24]3 years ago
3 0

Explanation:

In the given question, the trihybrid cross has been provided for the height trait and it is provided that recessive alleles (aabbcc) contribute 10 cm whereas dominant allele (AABBCC) contribute 22cm.

The height contributed by each dominant allele (A+A+B+B+C+C)= 22cm

The height contributed by each recessive allele (a+a+b+b+c+c)= 10 cm

The dominant genotype is 12 cm taller than recessive genotype which indicates that dominant allele contributes 2 cm.

In trihybrid cross-64 genotype will be formed with these dominant allele based on which the height of the plant will be determined.

The genotype with dominant allele (Height) and F2 progeny are

0 (10cm) -  1/64

1 (12cm)-    6/64

2 (14cm)-   15/64

3 (16 cm)-  20/64

4 (18cm)-   15/64

5 (20 cm)-  6/64

6 (22 cm)-  1/64

You might be interested in
List the five classes of antibody heavy chains and provide one function for each.
Lesechka [4]

Answer:

IgM, IgA, IgE, IgD and IgG

Explanation:

IgM functions in the initial response to offence.

IgA is important for protection of mucus membranes such as in saliva, sweat, tears and gastric fluid.

IgE is active during allergic reactions and defense against infections.

IgD is found on the surface of lymphocytes and is activated upon contact with antigens.

IgG forms part of the secondary response to antigen and is also responsible for newborn protection.

8 0
3 years ago
Which lane describes the father?
geniusboy [140]
the answer is A according to my knowledge.
4 0
3 years ago
How are fossils different from animals living today?
postnew [5]

Answer: fossils are remains of dead or extinct animals/plants

8 0
3 years ago
Read 2 more answers
  How does the way animal cells use their vacuoles compare to the way plant cells use theirs?
ratelena [41]
The major difference is that plants use vacuoles to store excess amounts of water, while animal cells do not. A plant standing up straight compared to a plant wilting over is a result of water capacity in the vacuoles
8 0
3 years ago
You will develop a brief portfolio detailing the history of tsunamis in a modern society that could be used to teach others.
Maru [420]

The 2004 Sumatra Earthquake and Indian Ocean Tsunami gave us a vivid description of menace of major tsunamis. It also suggested that tsunami science and engineering were inevitable to save human society, industries, and natural environment.

An answer can be found in Japan. Japan is the country the most frequently hit by tsunamis in the world. The experiences are well documented and are continued as the local legends. In 1896, the tsunami science started when the Meiji Great Sanriku Tsunami claimed 22,000 lives. An idea of comprehensive countermeasures was officially introduced after the 1933 Showa Great Sanriku Tsunami. The major works taken after this tsunami, however, were the relocation of dwelling houses to high ground and tsunami forecasting that started in 1941. The 1960 Chilean Tsunami opened the way to the tsunami engineering by elaborating coastal structures for tsunami defense. The 1983 Japan Sea Earthquake Tsunami that occurred during a fine daytime cleared the veil of actual tsunamis. The 1993 Hokkaido Nansei-Oki Earthquake Tsunami led to the practical comprehensive tsunami disaster prevention used at present, in which three components, defense structures, tsunami-resistant town development and evacuation based on warning are combined.

The present paper briefs the history of tsunami research in Japan that supports countermeasures.

3 0
2 years ago
Other questions:
  • Where is a meteorite found?<br> 1) in space <br> 2) in earth’s atmosphere <br> 3) hitting the sun
    12·2 answers
  • 16. Which of the following explanations accounts for the
    11·2 answers
  • 01:22:21
    9·2 answers
  • The skeletal part of the musculoskeletal system: helps the body to create heat. protects the organs of the body. produces facial
    14·1 answer
  • What is the basic structure of a cell membrane?
    7·2 answers
  • In your own words, describe the purpose and process of translation. The purpose of translation is… The process of translation is
    7·1 answer
  • Given that a mineral has three mutually perpendicular planes of cleavage and breaks into cubes, is the mineral mica, pyroxene, a
    14·1 answer
  • Two metal balls are dropped from the top of a two-story building at the same time. One ball is twice as heavy as the other ball.
    14·1 answer
  • Plants and animals that lack color are commonly called albinos. In corn plants, green (G) is dominant to albino (g). A student
    13·1 answer
  • Which of the following is the key to an enzyme's function?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!