The nucleus of each cell in the human body contains 46 chromosomes, each chromosome holds the basic units of heredity known as ____ composed of strands of ____. ? DNA, genes ? genes, DNA ? gametes, zygotes ? zygotes, gametes
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The nuclear genome of the human cell is made of _________. 46 chromosomes 22 somatic chromosomes and the X and Y chromosomes and the genome of mitochondria 46 chromosomes and the genome of mitochondria 22 somatic chromosomes and the X and Y chromosomes (i.e. 24 chromosomes)
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1. In human body, most DNA molecules exist in the form of ____. Pure DNA Chromatin Chromosome Tetrad 2. What of the following is not part of the observations of karyotype? Number of chromosomes Length of chromosomes. Location of the centromere. Homozygous or heterozygous 3. A gamete is ____. A haploid that contains 1n of chromatin A haploid that contains 2n of chromatin A diploid that contains 1n of chromatin A diploid that contains 2n of chromatin 4. In human, the gender is determined as ____ XY to be male and XX to be female XY to be female and XX to be male 2n to be female and 1n to be male 2n to be male and 1n to be female 5. When in G0 phase, cells ____. Produce proteins for preparation of cell division. Synthesize DNA for preparation of cell division. Checking if everything is ready for cell division Left the cycle and stop dividing.
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sister chromatid Eukaryotic chromosomes are composed of ________, a combination of both DNA and structural proteins. These structural proteins are called ________ A typical human chromosome contains about ________ million nucleotides, yet the DNA is ________ around histones so that it can fit into the cell nucleus. Each species has a characteristic chromosome number. Human cells contain ________ chromosomes. Chromosomes exist in somatic cells as pairs called ________ chromosomes. Cells that have two of each type of chromosome are called ________ cells. Humans have ________ pairs of chromosomes, with a maternal source and a paternal source evenly providing the material.
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