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Ivahew [28]
3 years ago
10

Why is it difficult to distinguish between asteroids and meteoroid

Biology
1 answer:
Stells [14]3 years ago
5 0
Both are large, rocky bodies in space but asteroids tend to stay in the asteroid belt, while meteoroids are a bit smaller and more active.
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En el hombre el color negro de los ojos “A” domina sobre el color azul “a” Una pareja en la que el hombre tiene los ojos negros
umka21 [38]

Las respuestas a estas preguntas son:

a) Genotipo del padre Aa (ojos negros)

b) Cruzamiento: Aa (padre) x aa (madre)

c) Frecuencias genotípicas esperadas: 1/2 Aa; 1/2 aa  

En genética, dominancia completa se refiere al proceso  de herencia en la cual un individuo heterocigota, es decir, el individuo que presenta dos alelos diferentes para el mismo gen, presenta el mismo fenotipo que un individuo homo-cigota para el alelo dominante (el alelo dominante es aquel que enmascara la expresión del alelo recesivo en individuos heterocigotas).

En este caso, el carácter 'color de ojos' presenta un patrón de herencia monogénica, donde el alelo 'A' dominante codifica para el rasgo fenotípico ojos negros, mientras que el alelo 'a' recesivo codifica para el rasgo fenotípico ojos azules.  

En el ejemplo, la pareja tuvo progenie en la cual uno de los hijos presenta el rasgo recesivo ojos claros, con lo cual el padre debe ser heterocigota y poseer un alelo recesivo 'a'; mientras que la madre expresa el fenotipo recesivo y por lo tanto su genotipo es 'aa'. En consecuencia, el cruzamiento de un padre heterozigota 'Aa' con una madre homo-cigota recesivo 'aa' producirá una descendencia con una frecuencia genotípica esperada de 1/2 (50%) de hijos con ojos 'color negro' de genotipo Aa y 1/2 (50%) de hijos con ojos 'color celelste' de genotipo aa >>

Cruzamiento: Aa (padre) x aa (madre)

Gametos padre: 1/2 A; 1/2 a

Gametos madre: 100% a

Cuadro de Punett (combinaciones gaméticas):

                  A           a

a               Aa          aa

a               Aa          aa

En consecuencia,  este cruzamiento producirá 50% individuos ojos color negro (genotipo Aa) y 50% individuos con ojos color celelste (genotipo aa)

Podés encontrar más información sobre este tema en:

brainly.com/question/22398195?referrer=searchResults

7 0
2 years ago
Analyzing the following tree, prove the relationship between ray-finned fish and crocodiles using the characteristics given belo
7nadin3 [17]

Answer:

The Ray- Finned Fish has a bony skeleton just like crocodiles. Crocodiles evolved more and adapted to their environment. Along the way Crocodiles grew to have four limbs, were born from an amniotic egg, and then their eggs also have shells, unlike the Ray-finned fish. Therefore the three characteristics they do NOT have in common are: Four Limbs, Amniotic Egg, and Eggs with Shells. The one trait they do have in common is Bony Skeletons. They also both have vertebrae.

7 0
2 years ago
The six kingdom system was designed to account for great variation in the kingdom that contained the ________
Elis [28]

Answer:

Kingdom fungi , kingdom monera

3 0
3 years ago
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What are two environmental factors that contribute to the development of cancer?
kolezko [41]

Answer:Aging. ...

Family history. ...

Smoking. ...

Alcohol. ...

Sunlight and ionizing radiation. ...

Organic and inorganic chemicals. ...

Viruses and Bacteria. ...

Hormone therapy.

Explanation:

3 0
3 years ago
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timurjin [86]

Answer:

Label A: Nucleus

Nucleus can be described as the organelle in which the DNA is enclosed. The nucleus is found in every eukaryotic cell.

Label B: Vacuole

Vacuole can be described as an organelle which is used to store material such as waste. Hence, vacuole is known to be the storage house of a cell.

Label C: Ribosomes

Ribosomes can be described as structures which are present usually on the rough endoplasmic reticulum. The process of translation occurs in the ribosomes and they are hence known to be the protein manufacturing units if a cell.

Label D: Centrioles

A centriole is a cylindrical organelle which is usually made up of the protein tubulin.

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2 years ago
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