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marshall27 [118]
3 years ago
15

In flies, red eyes (r) are dominant to brown eyes (r). a heterozygous fly is crossed with homozygous recessive fly.

Biology
1 answer:
nadezda [96]3 years ago
7 0

<u>50%</u>  of offspring will have brown eyes

Explanation:

A heterozygous individual will have the genotype <em>Rr </em>while an individual who is homozygous recessive will have the genotype <em>rr.</em> A cross between the two will result in offspring with phenotype <em>Rr</em> and <em>rr</em> in the ratio of 1 : 1. This can be observed from the Punnet square attached.  The same is the case for the phenotype. The ration of brown eyes to red eyes will be approximately 1 : 1

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A gardener cut a branch from a shrub and planted it in a small pot where it grew into a new shrub this method of growing a new s
iragen [17]

This method of growing a new shrub is a type of asexual reproduction by fragmentation

Fragmentation is a type of asexual reproduction in which the parent organism is separated into many fragments, and each fragments will develop into complete matured individuals that are identical to the parent. Some animals and plants such as shrubs, ferns reproduce by fragmentation.



8 0
3 years ago
Every mollusk has a head, body, and _____. jointed legs a muscular foot hinged shells an external shell
STatiana [176]

Answer:  [B]:   " a muscular foot ".

______________________________________________

     "Every mollusk has a head, body, and <u>  muscular foot  </u> . "

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Hope this helps!

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4 0
3 years ago
Which organisms have the fewest similarities? Explain why these organisms still qualify as living things despite sharing few cha
VladimirAG [237]

Plants have the fewest similarities with the other two groups of organisms.

<h3>Plants vs animals</h3>

Plants generally comprise all living organisms that have chlorophyll and are able to manufacture their own foods by photosynthesis.

Animals, on the other hand, are living organisms that cannot manufacture their foods and are mobile. Animals are either vertebrates or invertebrates.

Plants qualify as living organisms because they are able to feed, excrete, reproduce, grow, respond to stimuli, die, and carry out other basic characteristics of living organisms.

More on plants and animals can be found here: brainly.com/question/5018082

#SPJ1

6 0
2 years ago
HELP ME PLEASE! List the steps scientists for using technology to find the half-life of an isotope.​
liubo4ka [24]

For radioactive materials with short half-lives, you use a very sensitive calibrated detector to measure how many counts per second it is producing. Then using the exact same set up you do the same at a latter time. You use the two readings and the time between them to determine the half-life. You don’t have to wait exactly a half-life, you can do the math with any significant time difference. Also, you don’t need to know the absolute radioactivity, as long as the set up is the same you only need to know fraction by which it changed.

For radioactive materials with long half-lives that won’t work. Instead you approach the problem differently. You precisely measure the mass of a very pure sample of the radioactive material. You can use that to calculate the number of atoms in the sample. Then you put the sample in a counter that is calibrated to determine the absolute number of disintegrations happening in a given time. Now you know how many of them are disintegrating every second. You use the following equations:

Decays per Second = (Number of Atoms) x (Decay Constant)

Half-life = (Natural Log of 2) / (Decay Constant)

And you can calculate the half-life

Hope it helps :)

Mark it as brainliest pls :)

6 0
3 years ago
The main purpose of models is to gain a better understanding of the world. True or fasle?
vesna_86 [32]
True. Especially if you are a visual learner. The models help explain the world in a easier way. Words is another method teachers and people use. But models make it fun and more understanding

4 0
3 years ago
Read 2 more answers
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