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sladkih [1.3K]
3 years ago
10

Select the correct answer.

Biology
1 answer:
irina1246 [14]3 years ago
3 0
A Leather jacket bdheueugenwudhe
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For all questions, assume that you have genes for beak color, tail-feather length, and feather color all linked (located) on the
Effectus [21]

1. If we cross YyLl (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits)

P:  YyLl  x  yyll

F1 generation: YyLl: 400 Yyll: 100 yyLl: 100 yyll: 400

Recombinant offspring are those children whose genes contain a non-parental allele combination  (neither allele group is directly inherited from either parent). This happens when genes are located on the same chromosome but are so far apart from one another so that their alleles get crossed over during meiosis. In this case, Yyll and yyLl are the recombinant.

2. Calculation of distance between Y and L.  

The numbers of the two recombinant types is 200 (100 Yyll + 100 yyLl) and 800 parental offspring.

Total number of offspring is 1000.

So: 200/1000*100=20 map units.

There is 20 percent recombinant offspring frequency.


7 0
2 years ago
When modeling fisheries: (You may choose one or more answers)
melomori [17]

Answer:

Option A, Fixed quota models are risky because slight miscalculations can result in fish population extinction

Explanation:

Some of the major drawbacks of modelling fishing are as follows –  

a) The fixed quota model is very risky as a miniscule change in attributes can result into extinction of fish.  

b) On the other hand fixed effort harvesting can decrease the risk of fish population extinction

Hence, option A is correct

6 0
2 years ago
If grey fur is dominant to white fur in a rabbit population, how many possible phenotypes will there be in the offspring of a cr
Ludmilka [50]
Allele for gray fur is A (dominant)
  Allele for white fur is a (recessive)
Genotype of heterozygous is Aa (heterozygous is gray, because its allele is dominant)
If we cross two heterozygous
<span>Parents: Aa  x  Aa
</span> <span>F1: AA  Aa  Aa aa</span>
The ratio between phenotypes is 3:1 (gray:white)
<span>AA Aa Aa  are with gray fur</span>
<span>aa is with white fur </span>
4 0
3 years ago
How is the concept of homeostasis related to disease and aging provide examples?
Alinara [238K]

Answer;

-Because of Homeostatic imbalance as we age our body organs become less efficient, and our internal conditions become less and less stable. This event has a risk for illness and produce changes we associate with aging.

Explanation;

-Homeostasis is the body's ability to maintain a relatively stable internal environment even though the outside world is constantly changing. It involves both positive feedback Loops and the negative Feedback loops.

-Aging is a general example of disease as a result of homeostatic imbalance. As an organism ages, weakening of feedback loops gradually results in an unstable internal environment. This lack of homeostasis increases the risk for illness and is responsible for the physical changes associated with aging.

6 0
3 years ago
2.
Andrej [43]

Answer:

it provides energy to the body.

4 0
1 year ago
Read 2 more answers
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