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notka56 [123]
3 years ago
7

18. A particular breed of dog can have long hair or short hair. When true-breeding long-haired animals were crossed to true-bree

ding short-haired animals, the offspring all had long hair. The F2 generation consisted of a 3:1 ratio of long- to short-haired animals. A second gene affects the texture of the hair. The two variants are wiry hair and straight hair. F1 offspring from a cross of these two varieties all had wiry hair, and F2 offspring showed a 3:1 ratio of wiry- to straight-haired puppies. Recently, a breeder of the short-, wiry-haired dogs discovered a female puppy that was albino. Similarly, another breeder of the long-, straight-haired dogs found a male puppy that was albino. The albino trait is due to a recessive allele. The two breeders got together and mated the two dogs. Surprisingly, all the puppies in the litter had black hair. How would you explain this result
Biology
1 answer:
aleksklad [387]3 years ago
6 0

Answer:

All the puppies have black hair because albino alleles are found in two different genes.  

If we let the letters A and B represent the two different pigmentation genes, the one of the dogs is AAbb, and the other is aaBB.

Their offspring are AaBb and so there are not albinos because they have one dominant copy of each gene.

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Answer:

The correct answer will be option-C

Explanation:

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The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.

This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.

Thus, Option-C is the correct answer.

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Describe the structure of the ovule and the formation of the embryo sac
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Answer:

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Explanation:

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Rich has been a therapist for over fifteen years and most of that time he has used an assessment tool that uses random pictures
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Rich is looking to determine anxiety and depression in individuals, so he utilized the Rorschach Inkblot Test for assessment.

<h3>What is Rorschach Inkblot Test?</h3>

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These enzymes are part of the elongation stage of translation and they catalyze the adding of amino acids.

5. Termination of translation happens when the ribosome hits a stop codon on the mRNA.

Termination is the stage in which the finished polypeptide chain (future protein) is released from the ribosome.

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