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nekit [7.7K]
3 years ago
12

Thinking about the process of meiosis, how do you think it is possible for gametes to end up with too many or too few chromosome

s?
Biology
1 answer:
bezimeni [28]3 years ago
4 0
But an egg or sperm only has one. That one is chosen at random, through a process called meiosis. When meiosis messes up, you can end up with to many or too few chromosomes. One extra chromosome in a egg or sperm means three in the fertilized egg and so trisomy.
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The older crust in this case would be at point D, the newest at point A.
umka2103 [35]

Explanation:

New ocean crust is formed at the mid ocean ridges. The new crust is then pushed away from the ridge as newer crust comes to the surface. The ocean crust then spreads out enlarging the ocean. The farer away from the ridge the ocean crust is the older the crust

3 0
3 years ago
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
3 years ago
The ability to cook, clean, bathe, work, attend school, and/or engage in social relationships is known as what? a. Organized beh
scoray [572]
<span> d. Functional capacity

Functional capacity is a psychological mechanism of an individual to thrive in an environment by self-care, like being able to cook, feed themselves, take a bath, wear clothes, attend specific events such as gatherings and particular themes, and others. </span>
7 0
3 years ago
Erika has type 1 diabetes and gives herself insulin injections to help manage her blood glucose level. One afternoon, Erika test
Kay [80]

Answer: Take a specific dose of insulin.

Explanation:

The type 1 diabetes is controlled by taking an optimum amount of insulin in the body which controls the blood pressure.

The blood glucose level of the blood if increases more than 150 mg/dL then medicines should be taken in order to decrease the blood glucose.

The blood glucose level of Erika is 260 mg/ dl then should immediately seek for insulin to lower down the blood glucose level.

6 0
3 years ago
Movement of the particles across the membrane stops when the concentration gradient no longer exists, the particles will continu
Leviafan [203]

Answer:

Once the concentration gradient no longer exists, particles will continue to diffuse due to random motion.

Explanation:

When there is a permeable membrane between two solutions with different concentrations, the concentration gradient will go from the compartment with more particles to the one with fewer particles to valance the concentrations on both sides of the membrane. Once the concentrations are equal, particles will still randomly move from one side to the other, but the number of particles that move to one side is almost the same as the number of particles that move to the other, so there is still valance and the same concentration in both sides.

8 0
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