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Helga [31]
3 years ago
11

Differentiate between parental ditype (PD), non-parental ditype (NPD), and tetratype (T).

Biology
1 answer:
coldgirl [10]3 years ago
5 0

Answer:

Parental ditype (PD):

Parental ditype may be defined as the teterad type of the ascus that contains two different genotypes. These genotypes are both of the parental type. These are non recombinant ascospores.

Non-parental ditype (NPD):

Non-parental ditype may be defined as the ascus spores that do not resemble with the parent genotype. These tetrad type are the recombinant type of the ascus.

Tetratype:

Tetratype are the spores that contains the four different genotypes. The two genotypes are the parental type and two are recombinant type. The tetratype indicates the single cross overs.

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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
3 years ago
What are the two main differences between capillaries in the periphery and capillaries surrounding the brain
Lorico [155]

Answer:

The options are not given but they are gotten from another websites.

A. Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells.

B. Capillaries surrounding the brain have pores and are surrounded by membranes of astrocyte cells.

C. Capillaries surrounding the brain have no pores and are not surrounded by membranes of astrocyte cells.

D. Capillaries surrounding the brain have pores and are not surrounded by membranes of astrocyte cells.

The correct answer is option A.

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells.

Explanation:

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells because

Capillaries are tiny blood vessels in the circulatory system that connect aterioles to venules. They are the most abundant or they are much blood vessels. They can penetrate the tissues of the body which allow passage of food nutrients, oxygen in the body thereby allowing exchange of nutrients and oxygen between the body tissues and the blood.

Capillaries surrounding the brain have no pores and are surrounded by membranes of astrocyte cells while capillaries in the periphery Capillaries surrounding the brain have pores and are not surrounded by membranes of astrocyte cells.

8 0
3 years ago
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3 years ago
what does the term expression mean in everyday language? How does the meaning of this word relate to the concept of gene express
Sunny_sXe [5.5K]

Answer:Expression means the process of making known ones thoughts and feelings. This relates to the concept of gene expression by the fact that the genes characteristics are made known through the phenotypes and the characteristics of the gene and it's information becoming known. The process of making things known in gene sequencing and the creation of proteins and its job.

Explanation:

I hope this helps I haven't taken bio in a couple years lol.

5 0
3 years ago
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Answer:

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7 0
3 years ago
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