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
Gnoma [55]
2 years ago
5

You are analyzing a human pedigree for a new disease and discover that the disease occurs with the same frequency in both sexes

and that 25% of the children from two unaffected heterozygous parents have the disease. This disease is displaying ____ inheritance.
A. autosomal recessive
B. autosomal dominant
C. sex-linked recessive
D. sex-linked dominant
Biology
1 answer:
Natasha_Volkova [10]2 years ago
6 0

Answer:

The correct answer is A. autosomal recessive

Explanation:

In an autosomal disease, the mutation occurs in the autosomal chromosome, not in the sex chromosome. In autosomal recessive disease if both the defected allele from parent comes in the child then only the child would be affected by the disease. If the offspring have single defected allele than he is said to be a carrier.

So as the defect is not in sex chromosome the disease will occur in the same frequency in both the sexes and if parents are carriers which means they are not affected by disease than 25% offspring can have the disease because out of four offspring one can get both the defected allele, one from each parent. So the correct answer is A.

You might be interested in
Explain how the reduction in biodiversity can effect the ecological balance in the dam
hodyreva [135]
<span>Damming a river has a variety of effects on the freshwater ecosystem, more than just altering the flow from A to B.  Dams create calm bodies of water, changing overall temperature regimes and sediment transport, leading to conditions which tend to favour generalist species. Loss of specialist species, particularly endemics, changes the community structure and leads to biotic homogenization.  A dam will withhold sediment in the reservoir, not just decreasing the amount of substrate available to local freshwater species, but even impacting diadromous, estuarine and marine species much further downstream.  The competition between resident species for food and breeding sites will increase as damming isolates populations, and perhaps more importantly, damming completely restricts migratory fish species.  Isolation may lead to decreases in genetic diversity and therefore puts species at greater risk from disease.  All of these effects may be exacerbated by changes in the surrounding land use.  Overall, damming river flow will lead to both a loss of native species, but also an increase in exotic species which are more likely to become established in degraded habitats. For this reason, dams are one of the greatest global threats to freshwater biodiversity.</span>
6 0
3 years ago
How is the thrush adapted to their habitat
Pavel [41]
<span>Temperate Decidous Forest.. </span>
5 0
3 years ago
Atomic mass is determined by the number of protons plus the number of
Luda [366]
Atomic mass is determined by the number of protons plus the number of neutrons 
7 0
3 years ago
Who first identified DNA? A) Rosalind Franklin B) Erwin Chargaff C) Friedrich Miescher D) James Watson
viva [34]

Answer:

Friedrich Miescher

Explanation:

5 0
3 years ago
Read 2 more answers
1. How many pounds of biological material is below that soil surface?​
Stella [2.4K]

Answer:

The amount of organic matter in mineral (sand, loam or clay) soils ranges from very low being 1% by weight, to average being 2 to 4%, and high being greater than 5%. There are also “muck” or organic or peat based soils that are 30 to 40% organic matter. The general consensus is the more soil organic matter the better.   approximately 45%

Soil Composition

The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.

Explanation:

8 0
3 years ago
Other questions:
  • Which tool can be used to determine the volume of a metal bolt?
    14·1 answer
  • Complete the analogy below. Rainfall is to precipitation as groundwater is to _____.
    6·2 answers
  • Photosynthesis takes place in plants and plant like organisms. What do plants absorb from the air? Why is this
    9·2 answers
  • There are six classes of nutrients that must be considered when planning your diet: water, proteins, carbohydrates, fats, vitami
    8·1 answer
  • When a cell copies its DNA (replication), the original DNA ladder is broken apart and new nucleotides are added to the center. T
    5·1 answer
  • Natural selection may affect allele frequency in populations due to the fundamental forces of evolution except which of the
    7·1 answer
  • Help pls
    6·1 answer
  • Which of the following is an example of natural selection?
    8·1 answer
  • The amino acid that become attached to a molecule of transfer RNA is specified by a
    5·1 answer
  • HELP ME PWEAS<br> Describe the properties of acids and bases. How are salts formed?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!