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Leni [432]
3 years ago
12

The fertilization in frog is called external fertilization.Why?​

Biology
1 answer:
spayn [35]3 years ago
4 0
Answer:

External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time.
Typically, frogs lay eggs. This process usually occurs through external fertilization, where the female releases her eggs from her body into water. Then, the male releases his sperm to fertilize them In this case, the eggs are fertilized inside the female's body before they are released.
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Huntington's disease is an inherited autosomal dominant disorder that can affect both men and women. Imagine a couple has had se
Vanyuwa [196]

1. The percent probability that the first child of the couple will have Huntington's disease is 50%

2. The percent probability that four of the seven children will have Huntington's disease is 6.25%

<h3>Genetical probabilities</h3>

The disease is autosomal dominant. Only one dominant allele is needed for the disease to be manifested.

The husband is Hh and the wife is hh.

            Hh    x     hh

         Hh   Hh   hh   hh

Hh (affected) = 1/2

hh (unaffected) = 1/2

1. Probability that the first child of this couple will have Huntington's disease is the same as the probability of having the disease. Thus, it is 1/2 (50%)

2. Probability that four of the seven children will have Huntington's disease is the same as the probability of having the disease in 4 places.

  1/2 x 1/2 x 1/2 x 1/2 = 1/16 or 6.25%

More on genetic probabilities can be found here: brainly.com/question/13764507

#SPJ1

7 0
2 years ago
Describe how oxygen and carbon dioxide diffuse both between the 1) alveoli and the blood, and 2) blood and the body tissues. Inc
sukhopar [10]
The change in partial pressure from the alveoli (high concentration) to the capillaries (low concentration) drives the oxygen into the tissue and the carbon dioxide into the blood (high concentration) from the tissues (low concentration), which is then returned to the lungs and exhaled.
Once in the blood of the capillaries, the O2 binds to the hemoglobin in red blood cells which carry it to the tissues where it dissociates to enter the cells of the tissues.
The lungs never fully deflate, so air that is inhaled mixes with the residual air left from the previous respiration, resulting in a lower partial pressure of oxygen within the alveoli.

7 0
3 years ago
Why are there two sets of phases during meiosis, but only one during mitosis?
sergey [27]

Bcoz.. In meiosis ti change ploidy of cell from diploid(n) to haploid(2n) .. 2 division occur.. This helps in formation of haploid gametes.. When two gametes fuse.. They form diploid (2n) zygote.

On the other hand..

There is only one division in mitosis...bcoz no change in ploidy.. Use in growth. Bcoz it retains nucleo-cytoplasmic ratio.

6 0
3 years ago
If you had to explain the parts of an animal cell to your younger cousin, what comparison or example could you use for the cell
Nikolay [14]

Answer:

a animal cell it tiny little pieces in the animal bodies

6 0
3 years ago
Question 25 2 pts
Brrunno [24]

Answer:

Endothermic since it takes place in the egg :)

3 0
3 years ago
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