3 years ago

Which of the following statements about natural selection is true:

Biology

1 answer:

ss7ja [257]3 years ago

6 0

Answer:

Option 2 (Population of organisms change over time.

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The presence of ___________ is the key difference between gray and white matter.

Dmitrij [34]

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3 years ago

In pea plant the trait of yellow seeds (YY) is dominant over green seed (yy). Explain the inheritance pattern of F1 ad F2 genera

storchak [24]

Answer:

F1= All Yy

F1= All yellow

F2= 1/4 YY: 1/2 Yy: 1/4 yy

F2= 3/4 yellow: 1/4 green

Explanation:

The allele for the yellow-colored seeds (Y) is dominant over the allele that imparts green phenotype (y). A cross between two pure breeding yellow seeded and green seeded plants would obtain all yellow seeded plants in the F1 generation. Self-pollination of F1 progeny would obtain F2 generation in following phenotype and genotype ratio:

Phenotype ratio= 3/4 yellow: 1/4 green

Genotype ratio= 1/4 YY: 1/2 Yy: 1/4 yy