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enyata [817]
2 years ago
12

Lava flows formed the oceanic crust. True or false

Biology
1 answer:
scoray [572]2 years ago
5 0

Answer: true  

Please mark brainliest

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What are the most likely percentages for offspring of two red/white-feathers parents?
weeeeeb [17]

Answer:

The question lacks options, the options are:

parents?

A.100% red/white-feather chickens.

B.50% white-feather chickens and 50% red/white-feather chickens.

C.33% white-feather chickens, 33% red-feather chickens, and 33% red/white-feather chickens.

D.25% white-feather chickens, 25% red-feather chickens, and 50% red/white-feather chickens

The Correct answer is D

Explanation:

According to the question, the hybrid chicken has a mixture of red and white feather phenotypes expressed at the same time. This tells us that the red and white alleles are CODOMINANT in the chicken i.e. none is dominant or recessive over the other.

Let's assume that (R) allele is the red feather colour while (r) allele is for white feather colour. Therefore, the red/white feathered chicken will have a Rr genotype. In a cross between two red/white feathered chicken (Rr), the following offsprings will be produced RR, Rr, Rr and rr

RR- Homozygous red feather d chicken (1/4 × 100=25%)

Rr- Hybrid Red/White feathered chicken (2/4 × 100=50%)

rr- Homozygous white feathered chicken (1/4 × 100=25%)

8 0
3 years ago
Why do laying eggs is advantageous to fish​
Virty [35]

Answer:

You can lay multiple eggs at one time, and sit on them or bury them to keep them warm.

Explanation:

3 0
3 years ago
Read 2 more answers
Is it possible for a blood type O person to have a type O child if they have offspring with a type AB person? Explain if Yes. Ex
zysi [14]

Answer:

It is not possible because AB blood type will always be more dominant and if you make a punnett square you can see this. The blood type will more like be an A or B because those are the dominant alleles.

5 0
3 years ago
Organ made up of masses of aveoli
frez [133]
Lungs are made up of masses of aveoli

Please mark this as the brainliest answer if you can
6 0
3 years ago
What problem-solving techniques would a scientist use to find out how dolphins learn
Tatiana [17]
Try playing a game with the dolphin and see how quickly the game stimulates the dolphins brain and see if the dolphin gets used to or gets the hang of that game... I mean isnt how all animals are taught? Lol
7 0
3 years ago
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