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
VladimirAG [237]
3 years ago
7

In snapdragons, red flower color is incompletely dominant to white, with the heterozygote being pink; normal flowers are complet

ely dominant to symmetrical flowers; and tallness is completely dominant to dwarfness. The three gene pairs segregate independently. If a true-breeding white, tall, normal-flowered plant is crossed to a true-breeding red, dwarf, symmetrical flowered one, what proportion of the F2 plants will resemble the F1 plants in phenotype
Biology
1 answer:
IgorC [24]3 years ago
7 0

Answer:

9/32 Pink, Tall and Normal individuals Rr Tt Nn

Explanation:

<u>Available data:</u>

  • Red color RR
  • Pink color Rr
  • White color rr
  • Normal NN and Nn
  • Symmetrical nn
  • Tall TT and Tt
  • Dwarf tt

1st Cross:

Parental) rr TT NN   x   RR tt nn

F1) 100% RrTtNn

2nd Cross:

Parental) Rr Tt Nn   x   Rr Tt Nn

Knowing that these three genes assort independently, then we can infer that the F2 will have the next phenotypic proportions for each gene:

RR= 1/4 Red

Rr= 2/4  Pink

rr=1/4  White

TT + Tt= 3/4  Tall

tt=1/4 Dwarf

NN + Nn = 3/4 Normal

nn=1/4 Symmetrical

  • The proportion of the F2 plants that will resemble Rr Tt Nn (Pink, tall, Normal) in Phenotype

Rr= 2/4 pink

TT + Tt= 3/4  Tall

NN + Nn = 3/4 Normal

2/4  x  3/4  x  3/4 = 18/64= 9/32    

You might be interested in
Consider the models of cell reproduction. Evaluate the statements and select ALL that are NOT supported by the models.
Novosadov [1.4K]

Answer and Explanation:

The cell division cycle is responsible for increasing and maintaining cell number and size. This cycle is an essential feature of living organisms. There are four phases of cell division mitotic phase (M phase), growth phase 1 (G1), growth phase 2 (G2), and synthesis phase (S). One phase of the cell cycle ends, and the other starts; this is named a phase transition—a unidirectional alteration in the cell cycle phases. During G1, G2, and S phase cell grows and during the M phase cell divides. There are two models of cell reproduction as the clock model and the domino model. The domino model implies that cell division phases must occur in a distinct order and at a definite time. The domino model recommends that the cell cycle events are independent, while the clock model shows that the effectiveness of mitosis entrance was not persuaded by other actions.

5 0
3 years ago
Read 2 more answers
What is one way that cellular respiration differs from photosynthesis?
Ugo [173]

Answer:O The final product of cellular respiration is electromagnetic radiation.

The energy conversion in cellular respiration takes place in the chloroplast.

The main source of chemical energy in cellular respiration is water.

Explanation:

7 0
2 years ago
PLEASE HELP 15 POINTS GIVING BRAINLIEST
tigry1 [53]

the answer ito this is rainfall

4 0
3 years ago
Read 2 more answers
why does an advantageous trait increase in a population over time? key terms: variation, population, gene pool, fitness, relativ
MrMuchimi

Evolution is the gradual process resulting in the changes in the genetic material of a population over generations. The mechanism that Darwin proposed for evolution is the process of natural selection. Natural selection is the key mechanism of evolution which increases the frequency of advantageous alleles in a population.  Due to the limited resources in nature, organism with heritable traits favoring their survival and reproduction produce more offspring. It causes the population to become adapted to their environment and results in organisms with better survival ability and reproduction. These traits become heritable due to the reproductive advantage and are passed from the parents to the offspring. Over generations, the advantageous heritable trait becomes dominant in the population. It is responsible for the variation in the gene pool of the population which increases their fitness.

6 0
3 years ago
Complete the sentence about Alfred wegener's continental drift story.
kirza4 [7]

Answer:

The presence of similar <u>fossils(B)</u><u> </u> and <u>rock formations(C)</u> on several different continents supports the theory of Continental Drift.

Explanation:

Alfred Wegener observed fossils of organisms that were not supposed to have survived in the climate of where they were found. Other key findings is that he found fossils of organisms that were found in one continent and the same fossils found on another continent whose edges seem to fit together.

He also observed rock formations or stratas of mountain ranges in one continent seem to fit together with another continent.

<u>Added note:</u>

Even if Alfred Wegener had these evidences to present, his theory of Continental Drift was rejected mainly because he could not explain the mechanism of how the super continent (Pangaea) split.

4 0
2 years ago
Read 2 more answers
Other questions:
  • Scientists evaluate scientific evidence by using what
    15·1 answer
  • Which part of the endocrine system is located in the middle of the brain
    6·2 answers
  • Atmospheric air pressure is measured with a ______.
    10·1 answer
  • Why is biodiversity important to the stability of food webs
    11·2 answers
  • PLZZZ HELP ASAP THANKS :))))
    15·1 answer
  • 2 points
    6·1 answer
  • What is a plants lifecycle?
    9·1 answer
  • What is TRUE about the relationship between cells and the organism that they are a part of?
    13·2 answers
  • Explain the relationship between crossing over and genetic variation
    7·1 answer
  • What is the function of the ascending and descending tracts in the medulla oblongata? (module 13. 4c)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!