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.
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Which pathway requires oxygen in order to access the energy stored in carbohydrates?
a. Fermentation b. Alcohol fermentation c. Anaerobic respiration d. Aerobic respiration e. Lactate fermentation
This image depicts
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.
Which of the following does NOT cycle
through an ecosystem? a. water b. carbon c. energy d. phosphorus e. nitrogen
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)