Answer:
1. X + X
Explanation:
The sperm and the egg each carry half of the DNA for the zygote (which is one cell that eventually becomes a baby).
A normal human <u>male</u> has the sex chromosomes XY
A normal human <u>female</u> would have XX
If the Y chromosome is present, the result is a male.
If there either more or less than 2 sex-chromosomes, there is usually some sort of abnormality, like delayed development or the inability to mature and reproduce.
When you cross two heterozygotes with the genotype Aa, the offspring will be: <span>Parents: Aa x Aa</span>
<span>F1 generation: AA Aa Aa aa</span>
<span>This means that ½ of the offspring will be heterozygous, ¼ will be homozygous (dominant) and ¼ will be homozygous (recessive).</span>
The answer is; D
A limiting factor is a resource in the environment that significantly affects the growth, distribution or abundance of an organism or population within an ecosystem. When this factor is controlled it can result in increased or decreased growth.
In this water, the level of the water table in the desert limits the growth of the cacti plants.
Answer:
A Dominance hierarchy: a form of animal social structure in which a linear ranking exists, with each animal dominant over those below it and submissive to those above it in the hierarchy.
