2 Diferencias entre tropismos y nastias

Biology

1 answer:

koban [17]2 years ago

8 0

Answer:

Los tropismos son movimientos de la planta como respuesta a un estímulo externo que actúa en una sola dirección. ... Las nastias son movimientos rápidos y reversibles de la planta como respuesta a la presencia de un factor externo, pero a diferencia de los tropismos, no influye en ellas la dirección del estímulo

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Which is happening when humans control the breeding of living things to favor certain desired features?

astraxan [27]

That would be Artificial Selection.

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3 years ago

As the best-adapted members of a species produce offspring and pass on their favorable characteristics to succeeding generations

Serggg [28]

Answer:

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Explanation:

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3 years ago

In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color. The al

Lerok [7]

Answer:

The parent's genotypes are:

Ddpp - tall, white parent

ddPp - dwarf, purple parent.

Explanation:

This question involves two different genes coding for height and flower color in pea plants. The alleles for tallness (D) and purple color (P) are dominant over the alleles for dwarfness (d) and white color (p) respectively.

According to this question, a tall plant with white flowers is crossed with a dwarf plant with purple flowers to produce the following proportion of offsprings: 1/4 tall purple, 1/4 tall white, 1/4 dwarf purple, and 1/4 dwarf white.

Since some of the offsprings contain recessive alleles for both or either genes, the dominant traits of the parent is controlled by an heterozygous genotype. This means that the tall plant with white flowers has a genotype: Ddpp while the dwarf plant with purple flowers has the genotype: ddPp. In a cross between Ddpp × ddPp, 1/4 of each combination of alleles is produced in the offsprings (see punnet square in the attachment).