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tester [92]
3 years ago
15

Comparing organisms' DNA can show?

Biology
2 answers:
wel3 years ago
8 0
Comparing the DNA of two organisms can show how closely related two species are in terms of their evolutionary history (i.e. sharing a common ancestor). <span />
jeka943 years ago
5 0

Answer:

Can tell us how closely they are evolutionarily related.

Explanation:

Comparing the DNA of two organisms can tell us how closely they are evolutionarily related.  

This system of comparison revolutionized what was previously thought. When  species were related only by their physical appearance. While it was not bad at  all, the comparison of genetic information yields much more accurate results.

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A gene that affects hair length in dogs has two alleles. The allele for short hair (L) is dominant
Lelechka [254]

Answer:

This question lacks options, the options are:

A. Only recessive alleles are inherited from homozygous parents.

B. Dominant alleles grow weaker as they are passed from parents to offspring.

C. Only the parent with a dominant allele can pass that allele to offspring in sexual reproduction.

D. A heterozygous parent has an equal chance of passing either the dominant allele or the recessive allele to offspring.

The answer is D

Explanation:

This question involves a single gene coding for hair length in dogs. The allele for short hair (S) is dominant over the allele for long hair (s). This means that allele 'S' will always mask the phenotypic expression of allele 's' in a heterozygous state.

According to the question, two heterozygous dogs (Ss) were crossed to produce 6 shortt-haired offsprings and 2 long-haired offsprings. An heterozygous organism is that which contains two different alleles for a particular gene i.e. a combination of dominant and recessive alleles.

Based on this, during meiosis or gamete formation, an heterozygous dog (Ss) will produce gametes with the short hair allele (S) and long hair allele (s) in equal proportion i.e. 50-50. When the two gametes containing the recessive alleles (s) produced by each heterozygous parent fuses, an offspring with a recessive phenotype (long hair, ss) is produced.

Hence, a long-hair

phenotype can appear in the offspring of two short-haired dogs because a heterozygous parent has equal chance of passing either the dominant or recessive allele to the offspring.

6 0
3 years ago
A chronic cough, blood-tinged sputum, and dyspnea are symptoms of which cancer?
timurjin [86]

Answer:

lung cancer. i hope this helps

7 0
2 years ago
Jackson will be taking his college entrance exam next weekend. Part A Relate each of the following terms to his preparation for
Mnenie [13.5K]

Answer:

The answer is "Glutamate Hippocampus, Frontal lobe, Sympathetic nervous system Cerebellum, and GABA increase the performance during the exam".

Explanation:

The features that contributed himself to prepare successfully also for tests involve glutamate, the hippocampus, and the front lobes, because all of these variables are related to recall, and they know how great memory results throughout the research. Cerebellum, (GABA), a sympathetic nervous and also has a major effect on the output of Jackson the day of the exam since the nervous system sends extra blood to the muscles when stress is occurring whereas the cerebral cortex aids muscles in coordinating which,  Requires body function, like writing. Because of stress-free conditions, GABA is taken orally.

8 0
3 years ago
Analyze the result of a cross between two organisms that are both heterozygous for two different genes (AaBb) use a Punnett squa
krok68 [10]
(1) All the genotypes are as follows: AABB, AaBB, AABb, AaBb, aaBB, aaBb, AAbb, Aabb, aabb.

(2) Assuming that Aa is dominant and Bb is recessive, there will be 9 phenotypes with both A and B allele dominant (i.e. AaBb, AABb); there will be 3 phenotypes with just the A allele dominant (i.e. Aabb, AAbb); there will be 3 phenotypes with just the B allele dominant (i.e. aaBb, aaBB); and there will be 1 phenotype with both alleles recessive (i.e. aabb). The phenotypic ratio in this case is 9:3:3:1.

(3) The probability of producing an offspring with the aabb genotype is 1/16 or 6%.

4 0
3 years ago
Many genetic technologies involve the transferring of genes from one organism to another. For example, a gene in human DNA codes
valentinak56 [21]

Answer:

The universality of genetic code.

Explanation:

The DNA is a molecule made up from 4 different nucleotides (A, T, C or G). The sequence in which these nucleotides are ordered constitute a code that gives a cell instructions to produce a specific protein. This is called the genetic code.

Every three nucleotides code for a specific amino acid. For example, ACG codes for Arginine, CUC codes for Proline, and so on.

The genetic code is universal. This means that in all living organisms, a particular sequence of three nucleotides will code for the same amino acid. This property guarantees that the human gene that codes for human insulin will also code for human insulin in bacteria.

5 0
2 years ago
Read 2 more answers
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