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3 years ago

Give three example of range of variation that you see in life form around you

1 answer:

3 0

(i) Size: Organisms vary greatly in size ranging from microscopic bacteria to elephants, whales and large trees.
(ii) Colour: The colour of various plants and animals are quite different. Some worms are even colourless or transparent.
(iii) Life span: Life span of different organisms also varies greatly, e.g., a mosquito lives only for a few days while a turtle can live for around 200 years. Some pine trees also live for thousands of years. Vinila Choudary, Feb 9, 2012

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Like the right atrium, the left atrium also has valve in its auricle.

<h3>What is heart?</h3>

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3 years ago

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3 years ago

Punnett squares use mathematical probability to help predict the genotype and phenotype combinations in genetic crosses Select t

gladu [14]

Answer:

The first three steps are related to the construction of Punnett squares and the fourth step is not part of the square construction since information related to the phenotype It can be established as a conclusion or result of the genotypes obtained.

Explanation:

Punnett squares is designed to predict the mathematical probability of genotypes in the offspring, according to the genotype of the parental generation, and records only information related to this genotypes.

Taking as an example the crossing between a dominant homozygous (AA) individual for an character and a recessive one (aa), a Punnett square can be constructed:

A. All possible combinations of alleles in the gametes produced by one parent are written along the top edge of the square :

♀️\♂ A A 

B. All possible combinations of alleles of the other parent are written along the left edge of the square.

♀️\♂ A A 

C. All possible genotype are written inside the boxes within the square, as they might appear in the offspring

♀️\♂ A A 

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The result of the crossing of an individual with AA genotype and another aa is a offspring of Aa hybrid individuals, according to the information obtained from the Punnett square.

Information related to the phenotype is not part of the Punnett square, but from the genotype a conclusion can be drawn and established, which can be written below, and not on the sides of the square. In this case, the phenotype would be 100% of individuals exhibiting the dominant character A.

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