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
worty
15 days ago
11

A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur

. If a homozygous black rabbit is crossed with a heterozygous black rabbit, what phenotypic ratio will occur in the first generation?
A.
50% black : 50% grey
B.
100% black : 0% grey
C.
75% black : 25% grey
D.
25% black : 75

Biology
2 answers:
-BARSIC- [2.5K]15 days ago
6 0

The correct response is B

Assuming the black fur allele is B and the white fur allele is b, breeding a homozygous black rabbit with a heterozygous black rabbit will lead to the outcomes shown in the punnet square below;

Genotypically, 50% of the offspring will be homozygous dominant, while the other 50% will be heterozygous. However, all offspring will display black fur because the black allele is dominant over the grey allele.

vlada-n [2.5K]15 days ago
4 0

Answer:

B.  100% black: 0% grey

Explanation:

Since the black fur allele (BB) dominates the grey fur allele (bb), the offspring from a cross between a homozygous black rabbit (BB) and a heterozygous black rabbit (Bb) will result in all rabbits exhibiting a black phenotype.

The mating is displayed below:

Parental         BB        x         Bb

F1                BB      BB       Bb         Bb

The genotypic ratio =>  BB: Bb = 1:1 meaning 50% homozygous dominants & 50% heterozygous dominants.

The phenotype will be 100% black rabbits and 0% grey rabbits.

You might be interested in
If algae populations continue to decline, predict how this might impact the Great Barrier Reef food web.
vlada-n [2515]
I’m not entirely sure...
3 0
20 days ago
Read 2 more answers
Use the concept of a computer system to explain why it is difficult to determine clear distinct boundaries to a system. Include
-BARSIC- [2551]

Answer: Determining clear boundaries for a system is challenging because one must grasp specific concepts involved, such as boundaries and environments that can be either advantageous or detrimental. An illustrative example might be the OpenLearn course, which covers Computing & IT.

Explanation:

5 0
1 month ago
Consider an animal cell in which motor proteins in the kinetochores normally pull the chromosomes along the kinetochore microtub
enyata [2506]

The proper response is "yes, yes, no" or "B, B, A".

Clarification:

In this hypothetical situation, an inhibitor obstructs the function of motor proteins in the kinetochore while still allowing the kinetochore to stay attached to the spindle. The animal cells treated with this inhibitor can elongate during mitosis, leading to the separation of sister chromatids, but the chromosomes will remain still instead of moving to the poles of the cell. The only action the inhibitor affects is the motor protein function, which is responsible for the movement of chromosomes to the poles during cell mitosis.

5 0
27 days ago
When mammals get an infection, their internal body temperature often rises 2 to 3 degrees Celsius. The body gets the energy it n
vlada-n [2515]

Answer:

The correct response is to elevate the rate of cellular respiration within mitochondria.

Explanation:

In mammals such as humans, infections can lead to an increase in body temperature by 2 to 3 degrees Celsius. This rise in temperature is the result of thermoregulation tactics controlled by the host’s hypothalamus, which communicates through integrated signals from the immune system and hormones, thereby initiating a rise in metabolic processes due to enhanced cellular respiration in mitochondria, resulting in elevated body temperature. Mitochondria produce energy as ATP, contributing to body temperature as it’s part of an exothermic process.

The correct response is to elevate the rate of cellular respiration within mitochondria.

6 0
1 month ago
The ovarian cycle describes the monthly events of a post-pubescent ovary that causes a small number of primary follicles to grow
garik1379 [2080]

Answer:

The ovarian cycle manages the preparation of endocrine tissue, and the release of eggs within the female body.  

The ovarian cycle consists of a follicular phase. Gradual increases of FSH and LH stimulatethe growth of follicles on the surface of the ovary. This progression ensures that the egg is ready for ovulation. As the follicles mature, they beginto emit estrogens and maintain low levels of progesterone. Progesterone secures the endometriumto help facilitate pregnancy. The ovum takes about seven days to journey through the Fallopian tube and implant in the uterus. At this stage, the cells number around 30-60 and are identified as the morula. If pregnancy does not occur, the lining will be shed. Estrogen levels rise after roughly five days, leading the menstrual cycle into the proliferative phase. The endometrium initiates regrowth to replace the weakened blood vessels and glands from the previous cycle.

4 0
21 day ago
Other questions:
  • Rutherford tracked the motion of tiny, positively charged particles shot through a thin sheet of gold foil. Some particles trave
    9·2 answers
  • 20. Explain how health care professionals treat unregulated (or abnormal) cellular growth in the body
    9·1 answer
  • Predict the most likely outcome of culturing transformed e coli in the presence of tetracycline answer
    5·1 answer
  • In grasslands, goats are prey for both foxes and tigers. If the population of goats decreases because of natural causes, what ar
    14·2 answers
  • Walter has a degenerative condition known as multiple sclerosis (ms). in the context of specialized cell structure, his disease
    8·2 answers
  • How much more [H+] does lemon juice (pH 2) have compared with pure water (pH 7)? Remember that each pH unit represents a 10 fold
    14·1 answer
  • Does increasing the size of an axial substituent always result in higher relative strain energies for the axial conformation
    5·2 answers
  • Pete's therapist says, "Don't say you will never fall in love again, say, I will take time to know the person better next time."
    15·1 answer
  • Write a short discussion describing trends in the data: compare the control cups (distilled water) versus the experimental cups
    11·1 answer
  • Name the three principal ways in which a load may be applied to a specimen.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!