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
svet-max [94.6K]
3 years ago
11

In Andalusian fowl, B is the gene for black plumage (head feathers) and B' (pronounced "B prime") is the gene for white plumage.

These genes, however, show incomplete dominance. The heterozygous (BB') condition results in blue plumage. List the genotypic and phenotypic ratios expected from the following crosses: a) black x blue b) blue x blue c) blue x white

Biology
2 answers:
Alenkasestr [34]3 years ago
7 0

Answer:

a. Phenotypic and Genotypic ratio= 1:1

b. Phenotypic and Genotypic ratio= 1:2:1

c. Phenotypic and Genotypic ratio= 1:1

Explanation:

The crosses are monohybrid involving a single gene coding for plumage color in Andalusian fowl. The alleles for this gene exhibit incomplete dominance, a genetic scenario whereby an allele does not completely mask the expression of another, instead it blends with it forming an intermediate phenotype.

In this case, allele B is for black plumage

allele B' is for white plumage

In an heterozygous state i.e. combined allelic state (BB'), an intermediate blue plumage is formed.

A black fowl will possess a genotype BB

A blue fowl will possess a genotype BB'

A white fowl will possess a genotype B'B'

In the crosses between these fowls as highlighted in the question above (see attached image), the following genotypic and phenotypic ratio will be produced by the resulting offsprings.

a) Black (BB) × Blue (BB') : 1:1 (2 Black, 2 Blue)

b) Blue (BB') × Blue (BB') : 1:2:1 (1 Black, 2 Blue, 1 White)

c) Blue (BB') × White (B'B') : 1:1 (2 Blue, 2 White)

svet-max [94.6K]3 years ago
4 0

INCOMPLETE DOMINANCE INHERITANCE:

<span>5.  In Andalusian fowl, B is the gene for black plumage (head feathers) and B' (pronounced "B prime") is the gene for white plumage.  These genes, however, show incomplete dominance.  The heterozygous (BB') condition results in blue plumage.  List the genotypic and phenotypic ratios expected from the following crosses:  a) black x blue  b) blue x blue  c) blue x white</span>

<span>6. </span><span>In snapdragons, petal color is determined by a single gene locus with two alleles making the "red" allele (R) incompletely dominant to the "white" allele (r).  Heterozygotes have petals, which are neither red nor white, but pink.  a) If a true-breeding red flower is pollinated with pollen from a white flower: What fraction of the seeds (F1 generation) would be expected to produce red-flowered plants?  What fraction of the gametes produced by the F1 plants would be expected to bear the R allele?  b) If two pink flowered plants are crossed, what genotypic and phenotypic ratios are expected among the offspring (F1 generation)?</span>

You might be interested in
if the number of births in a population is greater than the number of deaths what would you expect to see in terms of population
Lilit [14]
The population would increase drastically and we would run out of resources for food. then the birth rates would eventually equal out to number of death rates . we then wouldnt have anyone alive
3 0
3 years ago
I WILL GIVE BRAINLIEST 100 points
pogonyaev
The answer is b, chromatin
7 0
2 years ago
How does the transfer of energy change over time
Nikitich [7]

Answer: It just does.

Explanation: Over time the transfer of energy changes over time because of different things.

3 0
3 years ago
Read 2 more answers
one reason that electric power plants do not send out electrical energy as a direct current is that direct current can not be tr
777dan777 [17]

This is because direct power has no pulsation (waveform characteristic) that is significant in electromagnetic induction. The gradual increase and decrease of power, at a given frequency, in indirect power is significant in electromagnetic induction. This enables transformers to induce electricity into the secondary coil, from the primary coil, at the core of the transformer.Transformers transform electric power by increasing or decreasing the voltage and current of electricity.






8 0
3 years ago
If the membrane potential at the axon hillock becomes subthreshold an action potential will be fired.
kotegsom [21]
True bc it’s True !!!!
8 0
3 years ago
Other questions:
  • The most important mineralocorticoid regulator of electrolyte concentrations in extracellular fluids is ________.the most import
    14·2 answers
  • During which stage of a thunderstorm does the most precipitation fall
    15·1 answer
  • For a newly evolving protist, what would be the advantage of using eukaryote–like cell division rather than binary fission?
    10·1 answer
  • Why do you pass out if you lock your knees?
    6·1 answer
  • Before starch can enter a cell, it must be
    14·2 answers
  • What is the answer to the question above
    6·1 answer
  • Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower.
    13·2 answers
  • Which of these BEST describes the relationship between the atmosphere and hydrosphere?​
    5·1 answer
  • Formas en las que se puede recopilar la data experimental que va a ser analizada e interpretada.​
    14·1 answer
  • Desmosomes are made of the following cellular components
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!