Explain how the adaptations of the pentadactyl limbs are adapted for swimming in whales, running in lizards and grasping in frog
s and humans
1 answer:
This is an example of homologous structures.
Each of these limbs has adapted to enable organisms to survive in their environment.
All these animals have similar embryonic tissues, meaning they looked very similar as an embryo.
Homologous structures provide evidence that these animals all came from a common ancestor.
Each of these limbs has adapted to enable organisms to survive in their environment.
All these animals have similar embryonic tissues, meaning they looked very similar as an embryo.
Homologous structures provide evidence that these animals all came from a common ancestor.
You might be interested in
Answer:
This is a trick question, and only because the question is vague
Explanation:
Use a Punnet Square to figure out the percentages.
If the parent with freckles (let's just call them Parent A) is homozygous dominant, their genotype would be FF. The parent without freckles (Parent B) has a genotype of ff.
In any situation, the probability of these two having a child that is homozygous dominant for freckles is 0%. (see punnet squares for more info).
Now here's where it gets a little more confusing because the question is kind of vague on this.
Assuming that Parent A is homozygous dominant (both genes for this are dominant (FF)), then the probability of having a heterozygous (non-identical genotype letters, meaning they carry the recessive trait) genotype is 100%. However, if Parent A is also heterozygous, then that percentage decreases to 50%
For Situation A (Parent A is homozygous dominant), the probability of a homozygous recessive genotype is 0%
For Situation B (Parent A is heterozygous dominant), the probability of a homozygous recessive child is 50%.
Please see the Punnet square I made for more information.
Key:
- Homozygous Dominant: FF
- Heterozygous Dominant: Ff
- Homozygous Recessive: ff
(heterozygous recessive does not exist, because that would mean one of the genes is dominant, which would overpower the recessive gene)
I really hope this helps, and if you're confused by this, please do not hesitate to let me know!
