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kari74 [83]
3 years ago
8

In holly trees, red fruit (R) are dominant to white fruit (c), and spiny leaves (L) are dominant to smooth leaves (1).

Biology
1 answer:
nadezda [96]3 years ago
8 0

Answer:

The answer is D: 1

Punnet squares are FUN

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You perform the following dihybrid cross: A blaBx Ab/aB. The A and B genes control different traits. What phenotypic ratio would
Luda [366]

Answer:

Option-D

Explanation:

In the given question the genotype of parental allele is- AbaB X AbaB. The alleles formed will be- AB, Ab,aB, ab in which the crossover allele will be AB and ab.

1. Unlinked genes

Now of these alleles are unlinked then the alleles will assort independently of each other therefore performing the punnett square we will get dihybrid ratio as 9:3:3:1 in which  

1. A_B_ are 9

2. aaB_ are 3

3. A_bb are-3

4. aabb- 1

Since the crossover allele are AB and ab therefore A_B_ are 9 and aabb- 1 represent recombinant genotype.

2. Linked genes

When the genes will be linked then chances of crossing over will be reduced as a result of which only two type of allele will be formed which are-  Ab and aB and the recombinant frequency will become less.

Crossing these allele will  form Aabb , AaBb , AaBb  and aaBB  genotypes. The recombinant ratio will decrease as A_B_ is 2 and aabb is not present.

Thus, option-4 which states that the unlinked ration is  9:3:3:1  and linked ratio is  <9: >3: >3: <1 is correct.

7 0
3 years ago
Mixtures are very different from compounds. Mixtures can be physically separated into different components and compounds cannot
rosijanka [135]
B is not a mixture and thx el the asnwer
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3 years ago
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Explain how the use of a chemical designed to kill grasshoppers could reduce the population of peregrine falcons.
Butoxors [25]
Peregrine falcons have a wide diet, including many types of smaller birds. These birds eat bugs like grasshoppers. So, if the grasshopper population decreases, then the birds who are a food source to peregrine falcons will also have a lower population. This means that there is a lesser amount of food for the peregrine falcons to eat, so their population will decrease as well. 

Good luck with your problems!
6 0
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In which zone would you expect to find the greatest abundance of marine organisms? middle intertidal zone supralittoral zone hig
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High littoral zone has greatest abundance of marine organisms.

<h3>What is High littoral zone?</h3>

The intertidal zone, also known as the "littoral zone," refers to the seashore that is covered during high tide and exposed during low tide, revealing a unique biome that survives under such fluctuating conditions.

<h3>Where are most marine organisms found?</h3>

The majority of ocean life can be found in coastal habitats on the continental shelf, despite the fact that this area accounts for only 7% of total ocean area. The majority of open ocean habitats are found in the deep ocean beyond the continental shelf. Species that live in the oceans and on the coasts can help to create new habitats.

To learn more about Marine life from the given link

brainly.com/question/2498427

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1 year ago
Investigate the influence of self esteem and teenagers participating in risky behaviour ​
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Drug use (especially alcohol, tobacco, and marijuana) ...

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Dropout of studies.

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