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Lena [83]
3 years ago
7

Ability to roll the tongue is caused by a dominant allele. A woman is a "roller," but one of her parents is not. Reference: Ref

6-2 The woman is expecting a child with a man who is a "nonroller." What is the probability that their child will be a "roller"?
Biology
1 answer:
matrenka [14]3 years ago
5 0

Answer:

1/2.

Explanation:

The autosomal dominant trait may en defined as the trait that can express itself even in the heterozygous condition and in the homozygous dominant condition as well.

Let the B allele is responisble for the roll tongue and b is recessive allele. The woman can roll the tongue and she must have the genotype Bb because her one parents is normal. The woman married with a man with non roller ( bb). The Bb × bb cross results in the following progeny Dd, Dd ( roller), dd and dd ( non roller). The probability of the child being a roller is 1/2,

Thus, the answer is 1/2.

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Mary marries an unaffected man, justin, whose paternal uncle has galactosemia. determine the genotypes for justin's family.
vitfil [10]
1. Galactosemia is a disease that will only be expressed when a person is<span><span><span> homozygotic recessive for that trait. It's the same as saying it </span> has</span> 2 recessive alleles.

Dominant allele-</span><span> G
recessive allele- g
</span>
Homozygotic dominant:  GG <span><span>(doesn't express the disease)
</span>Heterozygotic : Gg (doesn't express the disease)
Homozygotic recessive: gg (expresses it)</span>

2.
-Mary has this genotype: G_ . This means it can be GG or Gg
-The exercise already says that justin's mother is GG (<span>Homozygotic dominant)
</span>- If his mother is GG, one of these G's is going to be passed to Justin. So, his genotype is either GG or Gg. Since we are not sure we write as: G_.
Justin's genotype: G_

3.
-
Justin's uncle has galactosemia so his genotype is: gg

-
If the uncle was able to receive two recessive alleles it means the mother had one to pass, and so did the father. However, in the diagram, it's not pointed out that they have a disease so it only leaves one possible genotype: Gg. Justin's grandparents are both Gg.

4. The last person to analyze is Justin's father.
If we crossed the grandparents (Gg x Gg) we could obtain these genotypes: GG, Gg, gg.
Justin's father doesn't express the trait, so it's not gg. That leaves us with either GG or Gg. Since we can't know for sure, onece again we write as G_
Justin's father: G_
3 0
3 years ago
Chose all that apply for spring tides
AURORKA [14]

Answer:

lol

Explanation:

I don't know good luck

5 0
3 years ago
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Easter Island is a small island in the southern Pacific Ocean. It lies approximately 3,500 kilometers east of Chile and is consi
mestny [16]

Answer:

Explanation:Define as it relates to adaptation

4 0
3 years ago
PLEASE HURRY I WILL MAKE YOU BRAINLIEST Which of the following is a limitation of models? A. It is often easier to study models
docker41 [41]

Answer:

d

Explanation:

The answer would be d because limitation of models is basically about non realistic part of models that separate them from real life which is what d is saying.

3 0
3 years ago
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What is the volume of 0.25 mol of ammonia gas at 1.00 atm and 273 K? (R= 0.0821 Latm/molK)What is the volume of 0.25 mol of ammo
ICE Princess25 [194]

Answer:

5.6L

Explanation:

Given parameters:

number of moles  = 0.25mol

pressure on gas  = 1atm

temperature  = 273K

Gas constant R = 0.0821Latm/molK

Unknown:

Volume of gas  = ?

Solution:

Using the ideal gas equation, we can solve this problem. The equation is a combination of the three gas laws: Boyle's law, Charles's law and Avogadro's law.

It is mathematically expressed as;

             PV = nRT

where P is the pressure

           V is the volume

          R is the gas constant

          T is the temperature

          n is the number of moles

All the parameters are in the appropriate units and we simply solve for the volume of the gas;

                1 x V = 0.25 x 0.0821 x 273

                      V  = 5.6L

4 0
3 years ago
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