Why do recessive x-linked traits occur more frequently and with greater severity in human males than in human females? select all that apply. check all that apply males have an x chromosome, but females do not. males have an x chromosome, but females do not. males have two y chromosomes, so they never receive a dominant allele carried on an x chromosome. males have two y chromosomes, so they never receive a dominant allele carried on an x chromosome. males don’t have alleles from a second x chromosome to mask the effects of alleles on the first x chromosome. males don’t have alleles from a second x chromosome to mask the effects of alleles on the first x chromosome. in males, x inactivation shuts off expression of the alleles on one x chromosome. in males, x inactivation shuts off expression of the alleles on one x chromosome. only females who inherit two x-linked recessive alleles fully express the recessive phenotype. only females who inherit two x-linked recessive alleles fully express the recessive phenotype. sperm are more likely to carry an x chromosome than a y chromosome.

Males don’t have alleles from a second X chromosome to mask the effects of alleles on the first X chromosome. Only females who inherit two X-linked recessive alleles fully express the recessive phenotype.

Explanation: The sexual chromosomes in humans are X and Y. Females carry XX  genotype and males carry XY genotype. Males inherite from their mother only one X chromosome, hence all the traits linked to that chromosome (alleles) will fully express and if the trait is a mutated allele that causes disease, it will be sever. While females inherit two X chromosomes and fully express the  phenotype when the two X carry the recessive alleles, otherwise they would be only carriers of the trait.

- Men do not have alleles of the second X chromosome to mask the effect of the allele on the first X chromosome.

- Only women inherit two X-linked recessive alleles that fully express the recessive phenotype.

Explanation:

- In genetics, dominant is the effect of certain genes on the appearance or called phenotypes of an organism. Autosomal dominant was discovered by Gregor Mendel who introduced uppercase letters for dominant alleles and lowercase letters for recessive alleles. Hereditary disease caused by autosomal dominant abnormalities does not pay attention to gender. The disease will be expressed every generation by someone who has a dominant allele.

- Genetic diseases that are linked by the X chromosome and are recessive (Xh), so boys (XY) will be exposed to certain genetic diseases because there is only one X chromosome, but girls (XX) are not necessarily affected by certain genetic diseases due to genes linked to chromosomes X and recessive will be covered.

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Class : Junior High

Subject : Biology

Keywords

- X-Linked

- Chromosome

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