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
GrogVix [38]
3 years ago
5

What phenotypic ratio would you expect as a result of a test cross between two individuals where 9) one that is homozygous reces

sive for alleles at two independent loci?

Biology
1 answer:
olasank [31]3 years ago
8 0

What phenotypic ratio would you expect as a result of a test cross between a dihybrid organism and one that is homozygous recessive for alleles at two independent loci?

a. 3:1

b. 9:3:3:1

c. 1:1:1:1

d. 1:2:1

e. 9:4:2:1

Answer:

c. 1:1:1:1

Explanation:

When a heterozygous individual for two genes is test crossed with a double homozygous recessive individual, the progeny is obtained in 1:1:1:1 phenotypic ratio. This occurs as the heterozygous dominant individual forms four types of gametes in 1:1:1:1 ratio while the homozygous recessive individual would form only one type of gamete having one recessive allele for each gene.  

For example, a test cross between TtRr (tall and red) and ttrr (short and white) would produce a progeny in following ratio=

1 tall, red: 1 tall, white: 1 short, red: 1 short, white

Here, T= tall, t= short, R= red, r= white

You might be interested in
Do you think molecules are larger or smaller than a cell in the human body?
JulsSmile [24]

Answer:

Yet you can turn up the magnification for an even closer look: Cells contain molecules that are made up of even smaller components called atoms. Figure 1: Levels of the body from smallest to largest: Atoms, molecules, cells, tissues, organs, and organ systems.

3 0
2 years ago
Every cell in an animal is separated from other cells and from the extracellular
crimeas [40]

Answer:

Cellular Fluids and Organelles

Explanation:

Hope this helped

3 0
3 years ago
Read 2 more answers
The entire genetic code consists of ____ codons.
frozen [14]
61/3 is the answer for this question
3 0
3 years ago
BEST ANSWER GETS BRAINLIEST!!!
ahrayia [7]
. Igneous rock is formed through the cooling and solidification of magma<span> or </span>lava<span>. The magma can be derived from </span>partial melts<span> of existing rocks in either a </span>planet<span>'s </span>mantle<span> or </span>crust<span>. Typically, the melting is caused by one or more of three processes: an increase in </span>temperature<span>, a decrease in </span>pressure<span>, or a change in composition.  In this case, the "rock" is ice. The hot water has cooled through a change of temperature to create a solid structure (ice).</span>
6 0
2 years ago
Read 2 more answers
Describe what normally happens to a persons blood sugar level soon after he or she needs a meal that contains carbohydrates
gavmur [86]
The pancreas detects that the blood sugar level is higher and releases insulin. It tells the liver to store glucose in the blood as glycogen.
This regulates the blood sugar levels
7 0
3 years ago
Other questions:
  • You have two black dogs who have a litter of puppies. You are surprised to find that there are 8 black puppies and 3 tan puppies
    11·2 answers
  • Some individuals are unable to digest the lactose found in the milk of Cows. The digestive systems of these individuals most lik
    14·2 answers
  • Over millions of years, birds developed as a species. This relates to
    11·1 answer
  • Substrate-level phosphorylation directly generates ATP during a chemical reaction. As a single molecule of glucose is completely
    12·1 answer
  • Which of the following is NOT a form of energy?
    15·1 answer
  • When one recognizes a friend at a party, which brain area is the first to receive the information from one's visual receptors?Gr
    15·1 answer
  • The- - - - - is the area of a tooth the cervix to the apex
    13·1 answer
  • An ecological process is represented below. Which statement describes an event in this process?
    9·2 answers
  • Math solve questions​
    7·1 answer
  • The reaction that creates ATP from ADP and Pi is energetically unfavorable. That means that it requires energy to carry out the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!