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when a man has an allele combination Ww for a trait, what percentage of his gametes will have a dominant allele for the trait?
a.) 75%
b.) 100%
c.) 25%
d.) 50%

Respuesta :

Answer:

The correct answer is option d) 50%.

Explanation:

  • Humans are diploid organisms who have 23 pairs or 46 chromosomes in their genome.
  • Each pair of chromosomes can also called as a pair of alleles.
  • Alleles are alternating forms of the same gene.
  • Of the 46 chromosomes, 23 are obtained from the mother and rest 23 from the father.
  • According to Mendel's law of dominance, the alleles can be either dominant or recessive. A dominant allele can show its character even if only a single copy of it is present in the diploid organism, while a recessive allele gets expressed only when both the allele present are recessive.
  • Unlike somatic cells which are diploid, gametes are haploid, that is, they possess only one allele for one gene.
  • According to Mendel's law of segregation, the allele representing each gene separate from each other during gamete formation, such that, each gamete gets a single allele representing each gene.
  • The man having an allele combination Ww for a particular trait, has one dominant allele (W) and the other recessive allele (w). The gametes produced by this man will have either a dominant allele (W) or a recessive allele (w).
  • Out of the two types of gametes (W and w), produced by the man, one has the dominant  allele (W).
  • The ratio of dominant allele(W) containing gamete to number of gametes possible (W or w) is 1 : 2.
  • Therefore, percentage of the man's gametes that will have a dominant allele is 50% (by converting the ratio into percentage).
samueladesida43

When a man has an allele combination Ww for a trait, the percentage of his gametes that will have a dominant allele is 50%.

WHAT IS SEGREGATION OF ALLELES:

  • An allele is a member of a gene, which comes in pairs. According to Gregor Mendel in his law of segregation, alleles separate into gametes equally.

  • This means that a man with a heterozygous allele combination of Ww will undergo segregation of alleles W and w equally into gametes.

Therefore, when a man has an allele combination Ww for a trait, the percentage of his gametes that will have a dominant allele is 50%.

Learn more about segregation of alleles at: https://brainly.com/question/16696982

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