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
What is the female reproduction organ called?
VladimirAG [237]
Uterus<span>Once girls become sexually mature, the outer labia and the mons pubis are covered by pubic hair. A female's internal reproductive organs are the vagina, uterus,fallopian tubes, and ovaries. The vagina is a muscular, hollow tube that extends from the vaginal opening to the <span>uterus</span></span>
4 0
3 years ago
Read 2 more answers
If you wanted a horse to foal in January when would you breed
Nana76 [90]
Since all thoroughbreds have the same birthday — January 1 — the best bet for a racing horse is to raise so that the foal drops right after that date. This means the yearling at his first birthday is a five-year-old and from then on he is ahead of the game with a five year of maturation before each.
6 0
3 years ago
Rosalind Franklin and Maurice Wilkins took X-ray photographs of DNA that revealed the molecule was shaped like a _____. square p
Dmitriy789 [7]
DNA is a double helix shape
3 0
3 years ago
Read 2 more answers
Question 30(Multiple Choice Worth 2 points) [OU.04]One meteorologist believes that global warming has caused a significant chang
Nina [5.8K]
I believe the answer is: Different scientists use different data for investigation.
I say that because different scientists have different equipment, ideas, and have different methods. I hope I was right and i hope it helped and i wasn't to late to answer this question.
4 0
3 years ago
Read 2 more answers
What physical ailments did deborah suffer from as a result of the excitement and stress of seeing her mother's cells for the fir
nadya68 [22]

Deborah feels pain from blood pressure and her blood sugar being high as a result of confusion. She saw a doctor who recommended her to reduce stress; she did reduce doing research trips and thereafter started making contact with Rebeca who from this point was only telling her positive developments.

3 0
3 years ago
Other questions:
  • Compounds that are not produced by organisms anywhere in nature are called __________.
    15·1 answer
  • Aminoácidos están unidos entre sí por medio de enla
    7·1 answer
  • A stroke in the primary motor area has caused don to lose control over his skeletal muscles on the right side of his body. what
    9·1 answer
  • If the nucleotide sequence of one strand of a dna helix is gcctaa, what would be the sequence on the complementary strand?
    12·1 answer
  • Compare and contrast the three main types of muscle tissue.
    7·1 answer
  • Can you write a short summary about DNA. The main facts and purposes plz and thankyou... WILL UPVOTE
    15·1 answer
  • Which jet stream affects weather in antarctica
    5·2 answers
  • Suppose that a cytoplasmic protein (a protein that will function in the cytoplasm inside of the cell) is synthesized by a partic
    8·1 answer
  • The image represents which biome? Also if you can please answer the other I will mark as Brainly!!!!!!
    12·1 answer
  • Why do you think the ecological footprint of bangladesh is so small why is it so large for people in the united states?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!