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aev [14]
2 years ago
13

A maternal effect can cause the offspring phenotype ratio to depart from that of classic Mendelian inheritance. In a species of

moth, the dominant allele N codes for brown eyes and recessive allele n codes for red eyes.
If an Nn female with brown eyes mates with an Nn male, what is the eye color phenotypic ratio of their offspring?

Biology
1 answer:
Luda [366]2 years ago
6 0
<h2>Maternal effect</h2>

Explanation:

In maternal effect the phenotype of the progeny is decided by the genotype of the mother

  • The female partner is one step ahead to her male partner
  • The ovum transcribes some of its nuclear genes prior to fertilization and these genes are responsible for the development of embryo that is why these genes are called maternal effect genes
  • This effect is observed in Drosophila

In the given question both male and female have brown eyes with Nn genotype,phenotype of the offspring will be decided by the genotype of mother(Nn) hence despite of having recessive genotype(nn) all the offsprings will show brown eyes

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Salamanders, ospreys, snapping turtles, and beavers all live in aquatic habitats. Salamanders lay their eggs in small freshwater
AveGali [126]

Answer:

A. Salamanders

Explanation:

Specialists species are species that can thrive in a unique and limited range of resources. They require a specific environmental condition to reproduce and survive in  environment and also have limited or few diets they need for nutrition. These limiting characteristics put them at a disadvantage of being endangered and threatened.  

Salamanders are endangered species that are fast going into extinction. They require wetland (freshwater pools) for reproduction to be possible, and feed mainly on insects. This makes them specialist species.

Ospreys, snapping turtles, and beavers are all generalist species. They can all thrive in a wide range of environmental conditions, and also have varieties of diets they can get nutrition from to survive.

6 0
2 years ago
Using the data, choose one of the 3 possible problems below. Justify your choice by writing a hypothesis to explain how it has s
amm1812

Answer:

Low Enzyme Production is the reason for no breaking down of food.

Explanation:

If the digestion of food did not occur so it means that there is low enzyme production because enzymes are responsible for the breaking down of food substances into simpler ones in order to absorb by the cells for the generation of energy in the form of ATP. So we can conclude that low enzyme production is the only reason for the stopping of breaking down or digestion of food.

7 0
2 years ago
An initial sti of the cervix that travels upward to infect the uterus, oviducts, ovaries, and pelvic cavity is called
Delvig [45]

Pelvic inflammatory diseases (PID)

<span>Pelvic inflammatory diseases (PID) is an diseases that affect 10-40% of women who had an infection of either gonorrhea or chlamydia and it usually occur when the initial infection  such as chlamydia or gonorrhea travels upward with other bacterias beyond the the cervix into the uterus,ovaries, oviducts and pelvic cavity. However, PID is major cause of infertility in young women.</span>

5 0
2 years ago
Read 2 more answers
brainscape: Restriction enzymes: A) act at the membrane to restrict the passage of certain molecules into the cell. B) are highl
PolarNik [594]

Answer:

C) are sequence-specific DNA endonucleases

B) degrade foreign DNA that enters a bacterium.

Explanation:

Restriction enzymes are the proteins that cut the DNA at a specific sequence.

<u>Restriction enzymes are also known as restriction endonuclease produced by bacteria that recognizes a specific sequence on DNA and split it by catalyzing the hydrolysis or addition of water molecule. </u>So, Restriction enzymes are sequence-specific DNA endonucleases.

The biological role of restriction enzymes is to restrict the entry of foreign DNA into the bacterium. <u>Restriction enzymes have the ability to restrict the number of bacteriophage strains that affect bacteria.</u>

Hence, the correct options are "C and B"

8 0
2 years ago
How would you expect the sternal ends of grandmothers and grandfathers ribs to look?
ipn [44]
I believe that the answer to the question provided above is that the sternal ends of elderly people would be must in curved compared to those who are young.
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.
3 0
2 years ago
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