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
sammy [17]
3 years ago
15

Pedigrees are used to help geneticists understand how traits are inherited between generations. The Romanovs, a Russian royal fa

mily, had a history of hemophilia, a sex-linked disorder that is determined by a recessive allele on the X chromosome.

Biology
2 answers:
svet-max [94.6K]3 years ago
6 0
The question is the following :
<span>What is the best evidence to prove that Irene was heterozygous for hemophilia?
A) Alice carried the recessive allele.
B) Alexandra carried the recessive allele.
C) Frederick carried the recessive allele.
D) Waldemar carried the recessive allele.


The correct answer is A

In the pedigree, marked with blue are the carriers of the X recessive allele ( they have one X that has the mutation and the other that doesn't).
Alice was Irene's' mother, and since both Alice and iIrene have the allele, it is safe to conclude that Irene inherited the recessive allele from Alice.</span>

Sliva [168]3 years ago
4 0

Answer:

the answer is option A

Explanation:

You might be interested in
A black swan and a white swan breed and produce offspring that are gray in color. What is the most likely explanation for this h
Andrej [43]
Codominance sudhqjeiwbdjwjsbwkdwn
8 0
3 years ago
What job does each organelle do in a cell?
erica [24]
I hope that it is correct

6 0
3 years ago
What is the difference between fine-grained and coarse -grained igneous rock?
saw5 [17]

Answer:

Intrusive rocks are coarse-grained in texture and crystallise slowly from magma deep in the earth's crust. Extrusive rocks are fine-grained in texture and crystallise quickly from lava on or near the earth's surface. The mineralogy determines the type of rock.

4 0
2 years ago
Read 2 more answers
In a well-balanced ecosystem, squirrels eat nuts, raccoons feed on squirrels, and bears feed on raccoons. It was observed that t
BlackZzzverrR [31]
Trophic levels go by, 
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)


So squirrels would be at a lower trophic level.
 Hope his help :)

7 0
3 years ago
Read 2 more answers
What makes angiosperm more advance than gymnosperm​
USPshnik [31]

Answer& Explanation:

Angiosperm is more advanced due to the mechanism of protection it has since developed as opposed to its predecessor, gymnosperm. Angiosperms could be deemed the inventors of animal-mediated pollination or dispersal, whereas gymnosperms mostly depend on wind-mediated pollination (which is far more of a gamble than animal mediated).

1) Angiosperms seeds are enclosed in fruits, which increases the chances of dispersal by either wind, water, or animals. Animals can eat the fruit and disperse the seeds via feces or by brushing the fruit off of their fur coats new areas of the terrain.

2)The development of flowers. Flowers are especially important because depending on the flower it can attract a set species of animals in order for pollination to occur. That species of animal could only focus on those few flowers and would allow the female part of the flower to receive pollen (produced by the male part of the flower) from all over the place. This theory is also applicable to animal mediated fruit dispersal.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which best describes John Greenleaf Whittier's purpose in "The Fish I Didn't Catch"?
    10·1 answer
  • The humerus is the long bone that extends from the shoulder to the elbow. Which skeletal system does the humerus belong to?
    10·2 answers
  • Describe two ways that ocean temperature can affect marine organisms.
    14·1 answer
  • You have just eaten a meal high in complex carbohydrates. Which enzymes will help to digest the meal?
    6·1 answer
  • 5. How do enzymes found in your saliva aid in digestion?
    7·1 answer
  • What is the bronsted lowry definition of an acid
    15·2 answers
  • Some over-the-counter medicines should not be given to very young children. For example, cold medicines contain decongestants an
    8·1 answer
  • What should you know about germs that are already in the food?
    11·2 answers
  • 17.<br> The human body uses carbohydrates as
    7·2 answers
  • What are the two alleles for tongue rolling?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!