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3 years ago

Define the role of DNA

Biology

2 answers:

Molodets [167]3 years ago

8 0

DNA primarily serves as a molecule for storing genetic information.

<h3>Functions of DNA</h3>

DNA refers to deoxyribonucleic acid.

It is a biomolecule found in the cells of virtually all living organisms. The molecule helps to store hereditary information.

DNA helps preserve traits across generations by the ability to replicate itself. Successive generations inherit copies of DNA through a complex process of gene expression.

More on the functions of DNA can be found here: brainly.com/question/3333223

Kruka [31]3 years ago

8 0

Answer:

<em>DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.</em>

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Arturiano [62]

Answer:

A. donation of excited electrons by chlorophyll a to a primary electron acceptor

Explanation:

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3 years ago

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Lelechka [254]

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4 years ago

In the family tree below, people with the recessive trait of attached earlobes are shaded gray

serious [3.7K]

<h2><u>Full Question:</u></h2>

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

What must be true about the person labeled "A"?

A. It is a male with at least one dominant allele.

B. It is a male with two dominant alleles.

C. It is a female with at least one dominant allele.

D. It is a female with two dominant alleles.

<h2><u>Answer:</u></h2>

Its a male with atleast one dominant allele.

Option A.

<h3><u>Explanation:</u></h3>

The gene for the attached earlobe is recessive while the gene for the free earlobes is dominant. In the phylogenetic tree, we can see that both the father and mother aren't having attached earlobes. So both of them are having atleast one dominant allele which makes them have free earlobe.

In the F1 offsprings, one of the female and a male is having free earlobes. So both of them have atleast one dominant allele. The 2nd female is having an attached earlobe. So both the recessive allele have come form one parent each. So both of them are heterozygous.

Thus, the male marked as A atleast have one dominant allele. He can be a homozygous dominant, but the probability is 25%.

8 0

3 years ago

Define the role of DNA​

Define the role of DNA