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goldenfox [79]
3 years ago
7

Your biology instructor has assigned you a lab exercise to test a hypothesis regarding the inheritance of stem length in pea pla

nts. If your assignment is specifically to conduct a monohybrid cross for stem length from available genotypes growing in the lab, which of the following crosses should be performed?
A. Tt with tt
B. Tt with tt
C. Tt with TT
D. Tt with Tt
E. TT with TT
Biology
2 answers:
Varvara68 [4.7K]3 years ago
5 0

Answer:

D. Tt with Tt

Explanation:

In the given question, the student wants to study the stem length in the plants which are controlled by the T (dominant) and t (recessive) alleles.

To study the monohybrid cross for the stem length, the student must cross the heterozygous forms of the gene for the trait as it will produce the mixture of variables of height.

      cross-              Tt     x   Tt

                          T            t

                T       TT        Tt

                t        Tt         tt

1. Genotype TT - tall height

2. Genotype Tt- tall height

3. Genotype tt- small height

Thus, Option-D is correct answer.

Likurg_2 [28]3 years ago
5 0

Answer:

D

Explanation:

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Answer:

B) They release oxygen that organism use to breathe.

Explanation:

The process of this is called Photosynthesis. The plant takes in carbon dioxide and sunlight. The sun and water makes it possible for the plant to make sugars which are glucose which is the plant's food. And the byproduct of that is oxygen.

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insens350 [35]

Answer:

It is important because if not then life would not exist at all except maybe in single cells forms

Explanation:

The body is made of so many cells and without cell specialzation, the cells would not know what to do, they would all be the same. The liver is so different from the skin from the eyes, from the tongue, and so on. That is why we need it so our body can do what it is supposed to do.

Thatś only really one example but I hope it helps!

4 0
3 years ago
Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). What is the expected p
asambeis [7]

Answer:

The correct answer would be- 1:1:1:1.

Explanation:

According to the question the cross between the two pea plants with the genotype RrYy and rryy where R for round seeds and r for recessive form that expressed wrinkled seed character. The other character of this dihybrid cross is the color of the seds Y for green and y for yellow seeds.

The cross is shown in the image attached that suggests that phenotypic ratio would be 1:1:1:1 as RrYy, Rryy, rrYy, and rryy.

Thus, the correct answer is : 1:1:1:1.

3 0
4 years ago
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krok68 [10]

Answer:

A

Explanation:

Because there are two DNA strands in the DNA molecule and they both rotate around each other in a helix formation. So two helixes = double helix.

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