If an X-linked disorder is lethal to the affected individual prior to the age at which one reaches reproductive maturation, the lethality will be expressed only in males. Why is this so?

What will be an ideal response?


Heterozygous females who are "carriers" and do not express the disorder are the only source of the lethal allele in the population.

Biology & Microbiology

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1.positive feedback loops regulating the release of male. 2.female reproductive hormones. 3.negative feedback loops regulating the release of male reproductive hormones. 4.regulation of the release of female reproductive hormones.

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Which of the following does NOT cycle

through an ecosystem? a. water b. carbon c. energy d. phosphorus e. nitrogen

Biology & Microbiology

In humans, the sex of an offspring is determined solely by the chromosomes donated by the male parent

Answer the following statement(s) true (T) or false (F)

Biology & Microbiology