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Mamont248 [21]
2 years ago
14

Why do individuals with recessive

Biology
1 answer:
Georgia [21]2 years ago
8 0
The answer is B.
Explanation: A recessive trait must be passed down from both parents
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Trisomy 21 can be caused by nondisjunction of chromosome 21, or by inheriting a Robertsonian fusion of chromosome 21 attached to
OLga [1]

Answer:

6 in total; 3 viable and 3 non-viable

Explanation:

Robertsonian translocation is one of the types of structural alteration in chromosomes, in other words, a rearrangement between chromosomes, which can occur between five pairs of acrocentric chromosomes (chromosomes with the centromere close to the end of one of the "arms"): 13, 14, 15, 21 and 22.

An individual who has Robertson's translocation between chromosomes 14 and 21 generally has only 45 chromosomes.

In addition, a carrier of this type of translocation can theoretically produce 6 types of gametes, however 3 of them are not viable.

As for the three remaining gametes: One is normal, and among the other two, one is balanced and the last is unbalanced.

So, theoretically, when combining a normal gamete, the probability of a child with down syndrome being born through these conditions is 1/3 (considering that the probability of producing a certain type of gamete is equal for the three types).

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Explain why a concentration gradient across a membrane represents potential energy.
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Osmosis is the answer. The molecules move
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for case # 2, use a guess and check method to determine whether the disease is dominant recessive or unknown. under each circle
Marat540 [252]

In case 2, we have a paternity problem, as the parents are recessive (aa) and the children are dominant (AA).

<h3>DOMINANCE AND RECCESSIVITY</h3>

An inheritance is said to be recessive when a certain trait is only expressed in zygosity, that is, an allele alone is not capable of manifesting a certain trait. We say that an inheritance is dominant when only one of the alleles is sufficient to manifest that trait. This means that this allele is expressed when it is zygous or heterozygous.

In this question, a verification method was requested to determine if the disease, however, exists a paternity error, this genealogy is not possible.

Learn more about zygous or heterozygous in  brainly.com/question/376455

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Which is not a way that advertisements promote alcohol?
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They never promote the negative side effects on drinkers

Explanation:

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What are the respiratory, digestive, and cardiovascular systems classified as​
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Explanation:

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH,

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