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Shalnov [3]
3 years ago
15

How do scientists distinguish between reptiles and mammals?

Biology
1 answer:
bekas [8.4K]3 years ago
4 0
Reptiles
lay eggs, have scaly skin, are cold blooded, doesn't need to feed their hatchlings

Mammals
Gives birth to life offspring, have hair on their bodies, are warm blooded, needs to provide food for young
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En un cruce entre peces naranjas y peces grises se obtiene una generación (f1) de 50% peces grises . Realice el cruce y explique
Ilya [14]

Answer:

Uno de los progenitores es heterocigoto para color naranja (Nn) y el otro parental es homocigoto recesivo para gris (nn). Al haber una cruza entre un homocigoto recesivo y un heterocigoto, la 50% de la progenie expresa color naranja (Nn), mientras que el otro 50% expresa color gris (nn).

Explanation:

<u>Datos disponibles:</u>

  • Cruce entre peces naranjas y peces grises
  • 50% de la F1 son peces grises
  • Naranja dominante sobre gris

Podemos nombrar el alelo dominante para color naranja <em>N</em>, y al alelo recesivo  para color gris <em>n</em>.

Para que en un cruce entre dos fenotipos distintos, el 50% de la primer camada exprese uno de estos fenotipos, entonces uno de los parentales debe ser heterocigoto, mientras que el otro parental debe ser homocigoto recesivo. De esta forma 50% de la primera generación expresara uno de los fenotipos, mientras que el otro 50% expresará el otro fenotipo.

Supongamos que uno de los parentales lleva el genotipo <em>Nn</em>, y el otro parental es <em>nn</em>.

Cruce:

Parental)      Nn    x     nn

Gametas)   N    n       n    n

Fenotipos) Naranja     Gris

Cuadro de Punnett)      N           n

                            n       Nn         nn

                            n       Nn         nn

F1)  2/4 = 1/2 = 50% de la progenie tendrá genotipo heterocigoto, Nn

     2/4 = 1/2 = 50% de la progenie tendrá genotipo homocigota recesivo,    

     nn

     50% de la progenie será color naranja (Nn)

     50% de la progenie será color gris (nn)

               

3 0
3 years ago
Which of the following is not a characteristic of an enzyme?
Ivan

Answer:

B

Explanation:

if my memory is right then ima say B! pls brainlist if its correct!

3 0
3 years ago
According to water resource experts, what are the two main causes of water waste?
Tom [10]

Answer:

"low cost of water to users and lack of government subsidies for improving the efficiency of water use"

Explanation:

- low cost of water to users and lack of government subsidies for improving the efficiency of water use

The leading cause of water pollution? agriculture.

In the western United States, as compared to the eastern United States, the major water problem is chronic drought and insufficient runoff

6 0
2 years ago
Sickle disease cell is a recessive genetic disorder. How many copies of the mutated gene (HbS allele) do you need to develop ful
solmaris [256]

Answer:

<u>It takes two copies of the mutant gene.</u>

Explanation:

<em>One from each parent, to give somebody the all-out sickness. Numerous individuals have only one duplicate, the other being typical.</em>

<em />

Hope this helped and have a great afternoon!

<em>~ChokieWokie~</em>

6 0
3 years ago
16. Which excretory organ helps to control the water potential of the tissue
Yanka [14]

The answer is a Kidneys

5 0
3 years ago
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