During prophase I, all four chromatids of the two homologues become closely associated as a result of pairing, forming a structure known as a tetrad or bivalent.
<h3>What is a tetrad?</h3>
A tetrad is a structure formed during the prophase I stage of meiosis I whereby two homologous chromosomes pair together.
Meiosis occurs in two stages of division namely;
- meiosis I
- meiosis II
In meiosis I, homologous chromosomes are separated but are first paired during the prophase stage to form the tetrad or bivalent structure.
Therefore, during prophase I, all four chromatids of the two homologues become closely associated as a result of pairing, forming a structure known as a tetrad or bivalent.
Learn more about tetrad at: brainly.com/question/12793757
Answer:
The statement is false.
Explanation:
Industrialized countries are developed countries which have various sources of energy. In these countries 85% of commercial energy comes from burning fossil fuels, hydropower constitute about 6% of total commercial energy, nuclear power constitutes 5%, biomass, and other sources contribute up to 4%.
In developing countries 58% of commercial energy comes from fossil fuels, biomass contributes 35%, and hydropower contributes 6%. There burning of solid waste is not a major source of energy in industrialized countries.
50% Not sure how you would draw the punnett square, however heterozygous means different so it would be Ab and homozygous dominant means the same but one is upper case and one is lower case Aa.
AA AA
Aa Aa
<span>In gymnosperms, the seed coat develops from the integument. in angiosperms, the seed coat develops from the </span>integuments.
