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melamori03 [73]
3 years ago
5

After an RNA molecule is transcribed from a eukaryotic gene, what is removed and what is spliced together to produce an mRNA mol

ecule with a continuous coding sequence?a) operators; promoters. b) exons; introns. c) silencers; enhancers.
d) introns; exons. e) promoters; operators.
Biology
1 answer:
Nadusha1986 [10]3 years ago
6 0

Answer:d)introns; exons

Explanation:Introns are the non-coding portion of the DNA. They do not code for a gene that can be expressed hence the need for them to be removed from the coding genes(Exons). The exons are then joined together after the introns have been removed to create a sequence of amino acids.

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An organism with 24 chromosomes in each body cell will produce sex cells with __________ chromosomes
zhuklara [117]
12 chromosomes

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3 years ago
The diagram shows two cells. Identify structures C, D, and E and explain how they work together to perform a specific process wi
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C is endoplasum, d is ribosomes , e is mitocondia

Explanation:

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Populations of the grasshopper Vandiemenella viatica possess different chromosomal fusions and inversions. Grasshoppers that are
svetlana [45]

Answer:

The options

a. New combinations of genes yielding genotypes of greater fitness

b. Few heterozygotes because of underdominance

c. Frequency-dependent selection, leading to fluctuations in fitness

d. Heterozygotes with greater fitness, owing to overdominance

e. A random assortment of genotypes because of genetic drift

The CORRECT ANSWER IS b.

b. Few heterozygotes because of under dominance

Explanation:

In genetics, underdominance (at times called "negative overdominance") is the opposite of overdominance.

It is the selection against the heterozygote, that leads to disruptive selection and divergent genotypes. It occurs in cases of inferior and reduced fitness (As in our case study, it is the different chromosomal fusions and inversions)

of the heterozygotic genotype to the dominant or recessive homozygotic genotype. It is unstable as it causes fixation of either allele.

Another example is the African butterfly species Pseudacraea eurytus, which makes use of Batesian mimicry to avoid predation. This species carries two alleles that gives a coloration that is alike to a different local butterfly species that is harmful to its predator. The butterflies who are heterozygous for this trait are observed to be intermediate in coloration and thus encounter an higher risk of predation and a decrease in the total fitness.

3 0
2 years ago
Most of the energy needed by eukaryotic cells produced in
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Answer: ATP

Explanation:Each organelle supports different activities in the cell. Mitochondria, for example, are organelles that provide eukaryotes with most of their energy by producing energy-rich molecules called ATP. Prokaryotes lack mitochondria and instead produce their ATP on their cell surface membrane.

        hope i helped

4 0
3 years ago
Read 2 more answers
WHO CAN HELP 20 pys⭕️
zubka84 [21]
The mother has a 50% chance of having a child with that condition. Hope my work helps!
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