If you cross two organisms that are heterozygous for a trait, what percent of

Biology

1 answer:

brilliants [131]2 years ago

7 0

Answer:

25%

Explanation:

Here's an example: two chickens have the phenotype of white feathers and brown feathers. What percentage of the chicks will have the recessive color? First, you have to see the parents' phenotypes. Draw a punnet square. Put one of the parent's phenotypes (w and B) on the top, and the other parent's (w and B) on the right side going down. Whichever trait is dominant (brown) MUST be capitalized. Then, cross the two parents. first box on the top left would read 'ww.' The one below it is 'Bw' (put the dominant first). The right top is 'Bw' and the one below it is 'BB'. So if there were 4 offspring, these would be their genotypes: 'ww', 'Bw', 'Bw', and 'BB'. The only offspring that would have the recessive trait is the 'ww' child, because dominant overpowers recessive. So 25% would have the recessive trait and 75% would have the dominant trait.

You might be interested in

An element is defined as a substance that

meriva

Answer:

an element is a pure substance which can not be spilt into simpler substances by chemical means

Explanation:

examples hydrogen, oxygen, copper

3 0

4 years ago

Anxiety disorders are characterized by all of these symptoms except ____.anxiety disorders are characterized by all of these sym

lisov135 [29]

A person can be anxious when making an important decision when faced with a problem at work. Types of disorders are;
1. Generalized anxiety disorder symptoms include
a) irritability
b) muscle tension
c)Being easily fatigued.
2. Panic disorder symptoms include
a)feeling of being out of control during a panic attack.
b)Repeated and sudden attack of intense fear.
3. Social anxiety symptoms
a)Having a very hard time making friends.
b)feelings of self-conscious in front of other people
c)Staying away from where other people are.

8 0

3 years ago

Which is not a cost for organisms that sexually reproduce?

Alekssandra [29.7K]

Answer:

Identical shape and structure.

Explanation:

Those organisms that reproduce sexually have high variations and differences between the parent and its offspring. They are not identical to each other because the offspring gains half characteristics from male parent and half from the female parent making it different from its parent. Identical feature is present in the organisms that reproduce through asexually means from only one parent so the identical shape and structure is not the cost of sexual reproduction.

3 0

3 years ago

What movements do the quadriceps femoris muscles perform?

Anna71 [15]

Answer:

a. Extension of the lower leg

Explanation: is correct

6 0

3 years ago

how do scientists use fossil comparative anatomy and branching diagrams to explain the evolution of organism

Mnenie [13.5K]

Hi there!

In order to do fossil comparative anatomy and branching diagrams to explain the evolution of organism, scientists use radiocarbonation method.

Explanation:

Carbon-14 can combine with oxygen in the atmosphere to create carbon dioxide, which is then absorbed by plants and makes its way through the food chain. The amount of carbon-14 in living plants and animals matches the amount in the atmosphere, but when plants and animals die, they no longer absorb carbon-14.

Because radiocarbon has a known rate of decay, the scientists can now determine about how long it has been since the plant or animal was alive. The lower the amount of radiocarbon, the older the object.

(Sometimes, C-12 is also used)

7 0

3 years ago