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makkiz [27]
3 years ago
5

I really need help ?

Biology
1 answer:
sertanlavr [38]3 years ago
8 0

Answer:

C

Explanation:

A Scanning Electron Microscope can detect and analyze surface fractures, provide information in microstructures, examine surface contaminations, and reveal spatial variations in chemical compositions

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A diploid organism that has two identical alleles for the same trait is called _______ for that particular trait.
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Answer:

Answer: Homozygous

Explanation:

An organism in which the two copies of the gene are identical that is, have the same allele is called homozygous for that gene.

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Fatigue that occurs in response to extended submaximal exertion is usually due to ________ whereas fatigue to a short duration o
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In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite f
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Answer:

The question lacks options, the options are:

A) 1 out of 16

B) 3 out of 16

C) 6 out of 16

D) 9 out of 16

The answer is 1 out of 16

Explanation:

This is a DIHYBRID cross because it involves two different genes coding for distinct traits. One of the traits will be dominant while the other recessive. Hence, parents that are purebred for opposite forms of the trait means that one parent is homozygous dominant while the other is homozygous recessive. When these two parents cross, they produce F1 offsprings that all possess the dominant trait but heterozygous/hybrids.

When these hybrids are self-crossed, they produce four different combinations of gametes which when crossed using a punnet square will result in F2 offsprings with a 9:3:3:1 phenotypic ratio according to Mendel's observation.

9 represents offsprings that are dominant for both traits

The two 3's represents offsprings that are recessive for one trait and dominant for the other respectively.

1 represents offsprings that are homozygous recessive for both traits.

Hence, 1 out of 16 offsprings will be homozygous recessive for both traits.

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Where do echinoderms live?
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The phylum Echinodermata , which contains about 6000 species, gets its name from the Greek, literally meaning "spiny skin." Many echinoderms actually do have "spiny" skin, but others do not. This phylum exists exclusively in the sea, and cannot be found on land or in fresh water.
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