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fiasKO [112]
4 years ago
10

How many different phenotypes can be produced by a pair of codominant alleles?

Biology
1 answer:
Igoryamba4 years ago
3 0

Answer:

Three

Explanation:

Codominant alleles are those alleles that when ars togehter in the genotype (heterozygous) are  expressed simultaneously. An example of codominant alleles are  those for the AB blood types: when allele for A and allele for B are together in heterozygous, both are expressed in phenotype. Another two possible phenotypes produced by this pair of codominant alleles are  A blood type (when two A alleles are in homozygous genotype) and B blood type (when two B alleles are in homozygous genotype).

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4 years ago
How can two organisms with a dominant trait for a specific feature produce an organism with a recessive trait for the same featu
Liono4ka [1.6K]

Answer:

If the two organisms are heterozygous for the dominant trait.

Explanation:

For every trait, a diploid organism receives two forms of gene called ALLELE, from each parent. Allele is the variant form of a gene.

According to Mendel's law of dominance, for a particular trait, an allele is capable of masking the expression of another allele in a gene. The expressed allele is called the DOMINANT allele while the masked allele is called the RECESSIVE allele. Due to this, an organism can express a dominant trait even in a combined or heterozygous state i.e. different alleles.

When the two heterozygous organisms mate or are crossed, they undergo meiosis and their alleles are separated into GAMETES according to Mendel's law of segregation. For example; an organism with genotype (genetic make-up) Aa will produce gametes with A and a alleles.

Note that, a recessive trait can only be expressed in a homozygous state i.e. same allele. Hence, the two heterozygous organisms will produce gametes containing the recessive allele, which will likely combine to produce a recessive phenotype or trait.

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3 years ago
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HEYA !!!!

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Hope it helps you..

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4 years ago
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