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
olga nikolaevna [1]
3 years ago
12

Achondroplasia is a form of dwarfism inherited as a completely dominant trait. Two achondroplastic dwarfs have a dwarf child; la

ter, they have a second child who is normal. What are the genotypes of the two parents in this mating? What is the probability that their next child will be normal? A dwarf?
Biology
1 answer:
yulyashka [42]3 years ago
7 0

Answer:

There's 25% probability that their next child will be normal, and 75% of it being a dwarf.

Explanation:

Achondroplasia (A) is a dominant trait.

Two achondroplastic dwarfs (A_ x A_) have a dwarf child (A_) and a normal child (aa). The second child must be aa because if it had a dominant allele it would also be dwarf.

The only way for two achondroplastic parents to have a normal child is that <u>they are both heterozygous (Aa) for this gene.</u>

The cross Aa x Aa would produce the following offspring probabilities:

  • 1/4 AA - dwarf
  • 2/4 Aa - dwarf
  • 1/4 aa - normal

So there's 1/4=25% probability that their next child will be normal, and 3/4=75% of it being a dwarf.

You might be interested in
To be considered a living thing, it must have...
Kay [80]
All of the characteristics of life, hope I’ve helped ;)
8 0
2 years ago
What did the earliest vascular plants have
Nastasia [14]

These had no leaves or roots, instead they had green photosynthetic stems which served as both anchors in the ground and photosynthetic surface.

5 0
2 years ago
What percentage is the earth axis tilted at all times?
aliya0001 [1]
Earth Axial tilt
The answer is
23.44
8 0
2 years ago
What is a non renewable resource
kramer
Coal or oil are two of non renewable resources (:
3 0
3 years ago
Read 2 more answers
What is the rock cycle​
saveliy_v [14]

Answer: an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.

Explanation:

4 0
3 years ago
Other questions:
  • The receiving area of the brain for auditory impulses is in the
    15·2 answers
  • Name the type of allele. A_______allele exhibits its phenotype when it is present on both the chromosomes.
    11·2 answers
  • In DNA, only the _____ varies from one nucleotide to another. base phosphate amino acid sugar
    8·2 answers
  • James is making models of plant and animal cells using objects supplied by his teacher to represent organelles. For one cell, he
    10·2 answers
  • NEED HELP!!!
    13·1 answer
  • Plz answer the questions for me!!!!!!!
    8·1 answer
  • *50 POINTS* Please write it like "The reaction in this experiment is _______________ (exothermic OR endothermic) because _______
    14·2 answers
  • the girl was observing a slide of muscle under microscope identified the muscle of striated on the basis of​
    6·2 answers
  • why did the researchers add filtrate which macerated moss had been removed to control microcosms?(worth 5marks)​
    5·1 answer
  • Because identical twins begin as a single fertilized egg that then separates, identical twins share ____ percent of genetic make
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!