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Alex_Xolod [135]
3 years ago
13

When exposed to bright sunlight, some people involuntarily sneeze. This reaction is known as a photic response. It is controlled

by a single gene with two alleles, H and h.A man and a woman who sneeze when exposed to bright sunlight are both heterozygous for the photic response trait.
Identify the most likely inheritance pattern for this trait (dominant-recessive, codominant, sex-linked, or polygenic).

Biology
1 answer:
laiz [17]3 years ago
5 0

Answer:

dominant-recessive

Explanation:

Photic sneeze reflex is an autosomal dominant or dominant-recessive disorder that means that person having only a single dominant allele of the gene of trait will suffer from the disorder irrespective of the sex.

As mentioned in the question, the Photic sneeze reflex disorder is a condition in which a person, when exposed to bright sunlight,involuntarily sneeze.

Since the disorder is autosomal dominant, it means that A man and a woman who sneeze when exposed to bright sunlight can both be heterozygous for the photic response trait. Therefore, if one of the if one parents is affected, there are 50% chances that the child will inherit syndrome and be effected.

If you want to better understand the pattern of autosomal dominant or dominant-recessive disorders, please see attached image.

Hope it helps!

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Explanation:

Option 1.

4y=12

Dividing 4 both sides

y=3

Division property should be used.

Option 2.

\dfrac{y}{4}=12

Cross multiplying each other,

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y=48

Option 3.

2(4y)=12

Opening bracktet in LHS

8y=12

Dividing both sides by 8 i.e.

y=\dfrac{12}{8}\\\\y=\dfrac{3}{2}

Division property is used.

Option 4.

y+4=12

Subtracting both sides by 4 i.e.

Y+4-4=12-4

y=8

Subtraction property is used.

<em><u>It means that in option (4) Soo-Jung used the subtraction property of equality to solve an equation for y.</u></em>

3 0
3 years ago
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The correct answer will be-

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<u>Case I </u>

Evolutionary unity is a concept which explains that all the organisms possess some common structure or universal structure or molecules.

The best characterized evolutionary molecule is DNA molecule which took the role of genetic material in past and is passed on to the daughter cells and still is made up of the same components which are a five-carbon sugar, four types of nitrogenous bases and a phosphate group. This DNA molecule is present in almost every organism except for a few viruses.

<u>Case II </u>

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I don't know

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Refer a guide

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