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
zepelin [54]
3 years ago
6

Hairlessness in American rat terriers is recessive to the presence of hair. Suppose that you have a rat terrier with hair. Expla

in how can you determine whether this dog is homozygous or heterozygous for the hairy trait by setting up a mating.
Biology
1 answer:
Reil [10]3 years ago
8 0

Answer:

By performing a test cross i.e. a cross with a recessive trait

Explanation:

According to the question, hairlessness is a recessive trait, meaning that it will only be expressed in a homozygous condition i.e. when there are two recessive alleles in the genotype. Presence of hair is dominant, meaning that it will mask the phenotypic expression of hairlessness allele in a heterozygous state. Hence, a dominant phenotype can either be homozygous (same dominant allele) or heterozygous (combination of dominant and recessive alleles).

In order to determine which of these genotypes the dominant phenotype possess, we perform a test cross. A test cross is a cross performed to determine the genotype of the dominant organism by crossing it with a homozygous recessive genotype.

Ideally, the offsprings resulting from the cross will all be phenotypically dominant if the organism in question is homozygous dominant but if the organism is heterozygous dominant, the offsprings will occur in an equal ratio of dominant to recessive phenotypes.

So in this case, all of offsprings of this cross between the rat terriers will possess hair if the dominant rat terrier dog is homozygous, but if the dominant rat terrier dog is heterozygous, an hairless offspring will be produced.

You might be interested in
Lithium has 3 electrons. why do 2 electrons go in the first shell, and one in the second?
Lelu [443]

Answer:

B) The first shell only holds 2 electrons so the 3rd electron had to go in the second shell.

Explanation:

Electrons fill up from smallest to largest, the first electron shell only holds 2 electrons, so the remaining electron had to go to the second shell.

4 0
3 years ago
Rapid digestion of a cell by its own lysosomes is called
Xelga [282]

When the lysosomes of a cell rapidly digest the cell itself, this process is known as autolysis. This self digestion process helps in the decomposition of the dead cells. The cell is dismantled by its own lysosomes, which digests the remains of the dead cell. It is an essential process in the life cycle of a cell. This self digestion of the cells is extremely important for the new cells to grow.

Hence, the correct answer is 'autolysis'.

7 0
3 years ago
Define heredity its meaning
katen-ka-za [31]

determined by genetic factors and therefore able to be passed on from parents to their offspring or descendants.

4 0
3 years ago
Metalloids are good conductors of electricity. is it true or false?
Natalka [10]
This is true because electricity can be conducted throe metal not menials like plastic and rubber hope it helps

5 0
3 years ago
Read 2 more answers
When a cell gains water, what happens to its size and weight?
SIZIF [17.4K]
The water gets inside the cell and it looks like its going to burst...the weight will be heavier 
7 0
3 years ago
Other questions:
  • 3. Viruses containing RNA as their genetic information are called (1 point)
    13·1 answer
  • Which property of water explains its ability to prevent sudden changes in body temperature?
    9·1 answer
  • Which of the following is not an example of a motor skill?
    10·1 answer
  • What is different about the structure of active genes versus inactive genes?
    13·2 answers
  • Explain the relationship of entropy and disorder in the context of Shannon's formula.
    12·1 answer
  • Uhh 20 points and brainliest help ya girl out
    14·1 answer
  • Some girrfes have long necks and some have shorter necks.the ones with longer necks can reach food sources like y’all trees as w
    9·1 answer
  • Use the information from the article to answer the question.
    6·2 answers
  • PLEASE PLEASE PLEASE SOMEONE HELP ME WILL MARK BRAINLY IF CORRECT
    9·1 answer
  • In olden days,parents were regaeded as educators,and educators as parents.​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!