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
List three environmental factors that can be unhealthy?
Gre4nikov [31]

Answer:

pollution

nuclear/industrial waste

climate change

Explanation:

5 0
3 years ago
What is 0.640 as a fraction in simplest form?<br> Enter the answer by filling in the boxes.
timama [110]

Answer:

16/25

Explanation:

0.640 = 640

____, cancelling one zero, we have

1000

= 64

___, cancelling by 4, we have

100

= 16

___

25

5 0
3 years ago
In the reaction B + KEL+H, if an additional B is added, the result will be
djyliett [7]

Answer:

more info

Explanation:

3 0
2 years ago
Food Allergies ___________.
Anna007 [38]

\:  \:  \:  \:  \:  \:

<h3><u>C. are serious and can be fatal.</u></h3>

<u>hope</u><u> it</u><u> </u><u>helps</u>

<u>#</u><u>c</u><u>a</u><u>r</u><u>r</u><u>y</u><u>o</u><u>n</u><u>l</u><u>e</u><u>a</u><u>r</u><u>n</u><u>i</u><u>n</u><u>g</u>

3 0
2 years ago
Read 2 more answers
If a microscope has an eye piece lens with 40x power and you use the 10x objective, how much larger will your specimen appear?
guapka [62]
Well the 40x power and the 10x will produce a 400x magnification.
3 0
3 years ago
Other questions:
  • Most freshwater Hydrozoa exist only as ______.
    12·1 answer
  • A student observed that a type of eubacteria contains chlorophyll. Which of these does this type of bacteria have in common with
    6·2 answers
  • When a researcher transplanted the nucleus of an intestinal cell from a tadpole into an egg cell whose nucleus had been destroye
    7·1 answer
  • Ammonia is a compound. Each molecule of ammonia contains one atom of nitrogen (N) and three atoms of hydrogen (H). What is the c
    10·2 answers
  • Why is water molecule called polar
    14·1 answer
  • Which of the following is an example of Interspecific competition?
    9·2 answers
  • HELP
    5·2 answers
  • Why do phospholipids form a bilayer in water?
    14·1 answer
  • Why is it important for the mass to be measured before measuring the volume.​
    15·1 answer
  • The connective tissue that surrounds and separates individual skeletal muscle fibers (cells) is called:_________
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!