Why are invasive species considered a threat to native wildlife?

Leigh's disease is a mitochondrially inherited disease with symptoms that include seizures, fatigue, impaired reflexes, breathin

Ahat [919]

About the question:

You will find the pedigree in the attached files

Answer:

individual 4 → Affected woman → Black circle
individual 5 → Affected woman or man → Black circle or square
individual 7 → Healthy woman → Empty circle
individual 10 → Affected boy → Black Square

Explanation:

Mitochondrial inheritance is the transmission of a disease or a trait from the maternal line.

Most of the DNI is in the nucleus, but there is also DNI in mitochondria. Sperm cells hardly transfer mitochondrial genes to the progeny, so mitochondrial DNI is mostly inherited from the maternal side. If there exists any mutation in this mitochondrial DNI, the whole progeny of the mutated woman will be affected, as they will get the mother genotype carrying the mutation. On the contrary, if an affected man is carrying a mutation in mitochondrial DNI, non of their descendants will get the disease.

Before answering the question, let us remember the pedigree symbols.

Squares represent Males/Men
Circles represent Females/Women
Empty symbols represent healthy/non-affected individuals
Solid black symbols represent sick/affected individuals

In the exposed pedigree, we can see that the mother is affected by the disease (individual number 2), so all her children are also affected (individuals 4, 5, and 6) because the disease is mitochondrially inherited.

Individual 3 is a healthy man, so individual 4 must be an affected woman (Black circle). As she is the one affected, then all her children will also be affected. This couple had one boy and two girls. Individuals 8 and 9 are girls (circle), so individual 10 must be the affected boy (black square).

On the other hand, individual 6 is an affected man (black square), son of individuals 1 and 2. This man couples with a woman, and they have all healthy children. So this woman (individual 7) must be healthy. Even though the man is affected, all their children are not because their mother (7) is not. Remember that sperm cells do not transmit the mitochondrial genes to the progeny.

And finally, individual number 5 might be either a man or a woman. In any case, this person is also affected by Leigh's disease.

5 0

3 years ago

(a) (1) State similar characteristics between the sea teak leaf and the weeping willow leaf

m_a_m_a [10]

1. Answer:

Both these leaves are quite similar because of their physical appearance. The sea teak leaf and weeping willow leaf are narrow and elongated. However, a weeping willow leaf has tapered edges.

The scientific names of sea teak and weeping willow plants are Podocarpus polystachyus and Salix babylonica.

The leaves of both these plants are simple regardless of their receptive compound appearance. This is due to the presence of complex vein structure on the leaf.

2. Answer:

There many differences between sea teak leaf and weeping willow leaf.

Sea teak leaf is 3-10 cm long while weeping willow leaf is only 6 cm long.

Sea teak leaves are bright green and shiny while weeping willow leaves are green at top and white at the bottom.

The bark of weeping willow can be used to obtain various medicines. Meanwhile, the leaves of sea teak plants are chewed to ease pain of joints.

Weeping willow trees are found in areas of China, South-West Asia and Europe.

Sea Teak trees are found in Indonesia, Malaysia etc.

4 0

3 years ago

The bee fly resembles a honeybee, but the bee fly has no stinger. this is an example of _____.

Ksivusya [100]

Mimicry. Mimicry the close resemblance of 1 plant or animal to another for some purpose. mimicry is a similarity of one organism, usually an animal, to another that has evolved because the resemblance is selectively favoured by the behaviour of a shared signal receiver that can respond to both.[1] Mimicry may evolve between different species, or between individuals of the same species. Often, mimicry evolves to protect a species from predators, making it an antipredator adaptation.[2] The resemblances that evolve in mimicry can be in appearance, behaviour, sound or scent.

3 0

3 years ago

Which of the following does not contribute to soil consistence?

OLEGan [10]

Temperature is the one option among the given options that does not contribute to soil consistence. The correct option among all the options that are given in the question is the second option or option "b". Soil consistency is basically the resistance of the soil against mechanical stress, manipulations and various moisture contents.

5 0

3 years ago

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Scientists have debated the evolution of three life forms: reptiles, birds and dinosaurs. After many years of reviewing fossil r

Anon25 [30]

Answer:

Turtles were the first group of animals to branch off in this tree of animals.

Explanation:

Turtles were the first group of animals to branch off in this tree of animals. According to the tree, the animals share a common ancestor. The first branch shows that what we call a speciation event occurred, resulting in two lineages. The first group of animals to result were the turtles. All the other animals are on the other branch. This does not indicate that any group is more highly evolved than the other.

7 0

3 years ago

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