Answer:
The one who determines the gender of a new baby is the father, since he is the carrier of the X and Y sex chromosomes.
Explanation:
The sex chromosomes X and Y are called sex determinants, since the sex of the offspring depends on them:
- <em>XX</em><em> corresponds to the female sex.
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- <em>XY</em><em> corresponds to the male sex.
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A mother can only provide her offspring with X chromosomes, while the father can provide both X and Y chromosomes, so he is the one who determines the sex of a new child. In this case, the possibility of having a male or female child will always be 50:50
Answer:
Igneous rocks and Metamorphic rocks determine the age of the earth.
The right options are;
are disease-causing microorganisms
can be fatal
A pathogens is any substance or organism especially microorganisms that are capable of causing diseases. Pathogens include; bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease. Pathogens can be fatal and can be treated. Pathogens are diverse and they occupy essentially every environment.
