Question

Consider a human with a genotype aabbccddeeffgghh. how many different types of gametes could this individual produce, assuming that all of the genes are on separate chromosomes?

Answer 1

Only one ...as there is no heterozygous unit !

Answer 2

The genotype 'aabbccddeeffgghh' can give rise to the only type of gamete, which is 'abcdefgh.'

Further explanation:

A part of DNA that determines a functional trait is called a gene. A trait is a feature that can be passed on to future generations, such as eye color or height. There are different versions of a gene present in different people. These different forms of the gene are known as alleles. For instance, for different hair colors, different alleles are responsible.

The genes never occur in pairs and result in the expression of a given trait, whereas alleles always form pairs and bring about variation in the expression of a particular trait. The alleles in a pair can be dominant or recessive. When both the alleles of a gene are the same (either dominant or recessive), they are termed as homozygous, while if both the alleles are different in the pair, they are called heterozygous.

A set of genes together makes up a genotype that determines a particular trait in an individual. The physical expression of a genotype is termed as phenotype.

Here, the individual has a genotype 'aabbccddeeffgghh.' The number of gametes produced by this genotype will be:

aa            bb             cc          ddeeff             gg           hh

1 allele x 1allele x 1 allele x 1 allele x 1 allele x 1 allele x 1 allele x 1 allele

This results in one allele from each pair. Therefore, the gamete that is formed is 'abcdef.' This is because the individual is homozygous for the recessive allele. As a result, only one type of allele will be contributed to the gamete formation.

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Answer details:

Grade: High School

Chapter: Gene Interaction

Subject: Biology

Keywords:

Genes, alleles, trait, dominant, recessive, genotype, phenotype, homozygous, heterozygous, gamete.