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Maru [420]
3 years ago
14

Each of two parents has the genotype brown/red​, which consists of the pair of alleles that determine hair color​, and each pare

nt contributes one of those alleles to a child. Assume that if the child has at least one brown ​allele, that color will dominate and the​ child's hair color will be brown. a. List the different possible outcomes. Assume that these outcomes are equally likely. b. What is the probability that a child of these parents will have the red/red ​genotype? c. What is the probability that the child will have brown hair color​? a. List the possible outcomes.

Biology
1 answer:
Lina20 [59]3 years ago
5 0

Answer:

a. In image attached.

b. 25% or a 1 in 4 chance.

c. 75% or a 3 in 4 chance.

Explanation:

B = Dominant (brown gene)

r = Recessive (red gene)

If two parents both have Br genes, they will both have brown hair.

The Punnet square will look like the image attached.

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11. Punnett squares can also be used to predict genotypes of the parents. A guinea pig with short hair is crossed
emmainna [20.7K]

Answer:

Ss × ss

Explanation:

This question involves a single gene coding for hair length in guinea pigs. The alleles for short hair (S) is dominant over that of long hair (s).

According to this question, a guinea pig with short hair (S_) is crossed to one that has long hair (ss) to produce offsprings that have 44 short hair and 46 long hair. This number of offsprings produced indicate a ratio of 1:1, which can only be produced if the short haired guinea pig is heterozygous i.e. Ss.

Therefore, the genotype of the parents are Ss (short hair) and ss (long hair) i.e. Ss × ss. This combination will produce offsprings with the following proportion: Ss (1) : ss (1).

4 0
3 years ago
A second action potential cannot be generated until ________.
Bingel [31]

Answer:

"Action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern."

It is the mode through which a neuron transports electrical signals.

Explanation:

  • Option - (a) is the best choice to choose from,
  • <u>The refractory period :</u>

A second action potential cannot occur until the membrane has recovered or reestablished, this is the refractory period. The absolute refractory period coincides with inactivation of voltage-gated sodium channels which makes it impossible to generate another nerve impulse.

5 0
2 years ago
What factor made evolution more very slowly for the first two billion years of life on earth?
marusya05 [52]
It was an asteroid that came to earth two billions years ago and scientists says that there might be another one coming.so we might live in space for a couple of months or years. so that why the dinosaur die.
8 0
3 years ago
What are alleles?
Tatiana [17]

The answer is B

Hope this helped!

8 0
3 years ago
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<span>Less genetic variation than if the organism reproduced sexually. Asexual reproduction is kind of like cloning, the reproductions are copies of the organism.
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3 0
2 years ago
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