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dimaraw [331]
2 years ago
13

NEED HELP WITH THIS PLS

Biology
1 answer:
Crazy boy [7]2 years ago
3 0

Answer:

Explanation:

c

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How do lethal genes cause death in unborn babies and later after birth?​
Mamont248 [21]

Answer:

Recessive lethal genes can code for either dominant or recessive traits, but they do not actually cause death unless an organism carries two copies of the lethal allele. Examples of human diseases caused by recessive lethal alleles include cystic fibrosis, sickle-cell anaemia, and achondroplasia.

Hope this helps!

6 0
1 year ago
What do you think is meant by the statement, "DNA unites all organisms"
NARA [144]

Answer:

Easy. All life on this planet are products of DNA. It is what we all have in common.

8 0
2 years ago
The Himalayas in central Asia are the tallest mountains in the world. But fossils of seashells can be found high in these mounta
olganol [36]

Answer:

At one point in Earth's history the mountains were under water

Explanation:

Hope this help!!

8 0
2 years ago
Si se aparean especies diferentes como por ejemplo el cruce entre caballos y burros; podemos afirmar que si llegan a tener desce
White raven [17]

Answer:

El híbrido va a ser esteril.

Explanation:

En la cruza entre dos especies distintas, cuando ocurre, existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Es decir que no habrá exito reproductivo de estas cruzas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.  

  1.Pre-copulatorios o pre-cigóticos:

  • Ecológico o por aislamiento de hábitat;
  • Estacional o temporal;
  • Sexual o etológico;
  • Mecánico;
  • Por incompatibilidad de gametas.  

  2. Post-copulatorios o cigóticos:

  • Inviabilidad del híbrido;
  • Esterilidad del híbrido;
  • Híbrido con viabilidad o fertilidad disminuido;
  • Interacciones citoplasmáticas.

La mula es producto de la cruza entre dos especies distintas: una yegua (Equus ferus caballus) y un burro (Equus africanus asinus). Es un ejemplo de la accion de mecanismo poscigótico, en el cual se forma un híbrido viable esteril. Este ejemplar puede nacer, crecer y sobrevivir, pero que no puede producir gametas funcionales, por lo cual no puede reproducirse.  

7 0
2 years ago
A watershed can best be defined as a body of water where water collects overtime.
strojnjashka [21]
False a watershed is an area of land that contains a common set of streams and rivers that all drain into a single larger body of water
8 0
2 years ago
Read 2 more answers
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