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guajiro [1.7K]
3 years ago
8

A student claims that if the animal producing the spermatozoa has a mutation in a mitochondrial gene, the probability that any o

ffspring will inherit the mutation is zero. Provide evidence to support claim.
Biology
1 answer:
aalyn [17]3 years ago
3 0

Answer:

Mitochondrial DNA is inherited from the maternal side

Explanation:

Mitochondrial DNA is inherited from the maternal side (from the oocyte). The mitochondria from the sperm cell including their DNA are degrade after fertilisation.

The size of the cells that make the zygote also contribute to this. The oocyte is much larger than the sperm, containing around 100,000 mitochondria, whereas the much smaller sperm cell only contains around 100. This means even initially, there are very few paternal mitochondria compared to maternal mitochondria in the first place, effectively diluting them out.

This, coupled with the degradation of the sperm mitochondria, means that offspring will not inherit mitochondrial DNA and any mutations from their father.

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Question 8 (3 points)
Rainbow [258]

Answer:

Base

Explanation:

Deoxyribonucleic acid, DNA, is one of the four major biomolecules in living organisms. It is a polymer made up of monomers called NUCLEOTIDES. The nucleotides that make up a DNA molecule is composed of three substances namely: Sugar (deoxyribose), nitrogenous base, and a phosphate group.

However, among these three components of the nucleotide monomer, NITROGENOUS BASE is the only portion that is not the same in every DNA molecule. There are four nitrogenous bases in nature viz: Adenine, Guanine, Cytosine and Thymine. These four bases can be alternated in a DNA molecule.

Note that, phosphate group and deoxyribose sugar are constant in every DNA.

7 0
2 years ago
The exchange of segments of dna between the members of a pair of chromosomes is called:
Kitty [74]

Answer:

Chromosomal translocation

Explanation:

Segement of DNA in a chromosome is trans(ferred) located (location) to another chromosome, vice versa.

6 0
3 years ago
Plz help I will mark you brainlist ​
uranmaximum [27]
I think it’s D. H2, NaCI, CO
5 0
3 years ago
What is the difference between the ligamentum arteriosum and the ductus arteriosus?
Goshia [24]
In fetal life, the lungs are not expanded, so most of the blood from the right ventricle is shunted from the pulmonary artery to the aorta through the patent ductus arteriosus. With a few breaths the lungs expand, and blood flows from right ventricle to pulmonary artery into the lungs. Withdrawal of circulating prostaglandin from the mother plus bradykinins released from the expanding lung of the infant cause the ductus to close over a few minutes to hours. The closed ductus remains as the ligamentum arteriosum.
6 0
3 years ago
What is the similarity between excretory systems of insects, earthworms and vertebrates?
4vir4ik [10]

Los seres invertebrados y los vertebrados tienen más elementos en común de lo que se pensaba. Un estudio, con participación del Consejo Superior de Investigaciones Científicas (CSIC), prueba que existe gran similitud entre los sistemas excretores de ambos grupos de animales. Según la investigación, las células encargadas de filtrar la sangre en la formación de orina, alojadas en los riñones de vertebrados, son similares a las que realizan una función análoga en invertebrados.

7 0
3 years ago
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