answer.
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
spayn [35]
2 years ago
12

In a study of black guinea pigs and white guinea pigs, 100 black animals were crossed with 100 white animals and each cross was

carried to an f2 generation. In 94 of the crosses, all the F1 offspring were black and an F2 ratio of 3:1 (black:white) was obtained.In the other 6 cases half of the F1 animals were black and the other half were white. Why? Predict the results of crossing the black and white guinea pigs from the 6 exceptional cases.
Biology
1 answer:
Brums [2.3K]2 years ago
4 0

Answer:

The genotype of parents for 6 exceptional cross was

Bb * bb

Result for crossing the black and white guinea pigs from the 6 exceptional cases.

Bb * bb

Bb, Bb, bb, bb

Explanation:

Here trait for black guinea is dominant over the trait for white guinea

There is a possibility that for remaining 6 crosses, the genotype of parents would be as follows

Black guinea pig - Bb

White guinea pig - bb

Now when these two genotypes are crossed the following offsprings are produced

Bb * bb

Bb, Bb, bb, bb

Thus, out of four offspring half of them are heterozygous black and remaining half of them are white in color.

Now if these black and white guinea pigs from the 6 exceptional cases with genotype Bb and bb are crossed respectively, then following offspring are produced

Bb * bb

Bb, Bb, bb, bb

You might be interested in
which of the following is true about totipotent cells? A.) Embryonic stem cells are totipotent cells. B.) Totipotent cells can d
Savatey [412]
I think C is correct.
8 0
1 year ago
Read 2 more answers
The definition of theory says that a it is a hypothesis or group of hypotheses. In your own words, explain why a theory is also
melomori [17]
In scientific reasoning, a hypothesis is made before any applicable analysis has been done. A theory, on the opposite hand, is supported by evidence: it is a principle shaped as an effort to clarify things that have already been supported by knowledge<span>.

</span>For example: “It's bright outside.” 
Hypothesis: A projected clarification for a development created as a place to begin for additional investigation.

Theory: A well-substantiated rationalization nonheritable through the methodology and repeatedly tested and confirmed through observation and experimentation
4 0
2 years ago
Read 2 more answers
The gene that codes for gastrin is located on the _____ of chromosome 17.
Mnenie [13.5K]
I believe it's the long arm of chromosome 17.
3 0
2 years ago
Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have incr
adell [148]

Answer:

B) cAMP

Explanation:

Phosphodiesterase is an enzyme that breaks a phosphodiester bond, for example in molecules such as cAMP and cGMP. So, phosphodiestarases are  are regulators of signal transduction: regulate the duration of signaling pathway.

Caffeine is  central-nervous-system stimulant and the mechanisms of its action usually are: mobilization of intracellular calcium or inhibition of specific phosphodiesterases.

7 0
2 years ago
The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave
lidiya [134]
2 is the answer BCs I think it just might be it
5 0
2 years ago
Read 2 more answers
Other questions:
  • Which of the following traits was most important in enabling the first plants to move onto land?
    6·1 answer
  • Which energy conversion takes place in plant cells, but never in animal cells?
    13·1 answer
  • when muscles are active,cells use nutrients and oxygen at a higher rate and produce waste chemicals and heat more rapidly.descri
    14·2 answers
  • Evaluate accenture's history of branding campaigns. what remains consistent throughout?
    6·1 answer
  • A sample of an unknown liquid has a volume of 12.0 mL and a mass of 6 g. What is its density? Show your work or explain how you
    14·2 answers
  • How does ATP supply energy for cellular activities? by breaking off a phosphate group from its structure by releasing the sugar
    14·2 answers
  • The sebaceous glands are simple alveolar glands that secrete a substance known as sebum. The secretion of sebum is stimulated __
    10·1 answer
  • Shortly after the zygote is formed, it begins the processes of duplication and division. Each resulting new cell has:
    12·1 answer
  • Suppose a scientist identified two yeast mutants, called huh1 and huh2. The mutants have constitutive expression of the nop oper
    14·1 answer
  • The length of an axon is 10 mm, and its time constant is 4 msec. A voltage change at one end of the axon is 120 mV, which result
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!