why is this statement is wrong?

[A6project]

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a single chromosommes usually carryies two alleles(traits) of each gene.

actually, one more

in a homologous chromosommes, one chrommmmosomes carry dominant alleles and the other one carrrries recessssive alllllelles, right?

 

[Hidden]

a single chromosommes usually carryies two alleles(traits) of each gene.

actually, one more

in a homologous chromosommes, one chrommmmosomes carry dominant alleles and the other one carrrries recessssive alllllelles, right?

A single chromosome (haploid) carries one allele (produced through meiosis) until fertilization occurs. They then become homologous chromosomes (diploid) with one chromosome set from the mom and one chromosome set from the dad.

Each allele on the homologous pair can be either dominant OR recessive. So you have three possible combinations of homozygous dominant, heterozygous, or homozygous recessive.

 

[A6project]

you're right. thanks so much for the answer!

 

[mh0000]

A single chromosome (haploid) carries one allele (produced through meiosis) until fertilization occurs. They then become homologous chromosomes (diploid) with one chromosome set from the mom and one chromosome set from the dad.

Each allele on the homologous pair can be either dominant OR recessive. So you have three possible combinations of homozygous dominant, heterozygous, or homozygous recessive.

The only way a chromosome will contain multiple alleles of a gene is if one sister chromatid contained a mutation during or after replication or from improper crossing over that leads to a gene duplication in which the homologous chromosome contained a different allele.