1. In a heterozygote, a allele can completely mask or hide a allele 2. When the
ID: 268923 • Letter: 1
Question
1. In a heterozygote, a allele can completely mask or hide a allele 2. When the effect of one gene's expression completely masks the effect of another, the genetic phenomenon is called 3. The structure on a chromosome around where the spindle fibers attach during nuclear division is called the chromosomes are called may be prevented by the action of the enzyme known as and the ends of linear The shortening of these ends 4. Isolation of all the metaphase chromosomes out of a single cell and arrangement of these chromosomes into pairs is called production of a (This usually is studied as a photo.) One human disorder whose diagnosis could be confirmed by this type of production and examination of such a photo is 5. The opposing orientation of opposite strands of a double-stranded DNA helix is known as structure. 6. A type of enzyme activity that can remove incorrect nucleotides from the end of a DNA strand right at the time of its synthesis is specifically known as this kind of activity (must give type of enzyme and direction it works)Explanation / Answer
[1. In a heterozygote, a dominant allele can completely mask or hide a recessive allele
2. When the effect of one genes expression completely masks the effect of another, the genetic phenomenon is called dominance.
3. The structure on a chromosome around where the spindle fibers attach during nuclear division is called the centromere. and the ends of linear chromosomes are called TELOMERES .The shortening of these ends
may be prevented by the action of the enzyme known as telomerase.
4. Isolation of all the metaphase chromosomes out of a single cell and arrangement of these chromosomes into pairs is called Karyotype .One human disorder whose diagnosis could be confirmed by this type of production and examination of such a photo is Turner's syndrome.
5. The opposing orientation of opposite strands of a double-stranded DNA helix is known an antiparallel structure.
6. A type of enzyme activity that can remove incorrect nucleotides from the end of a DNA strand right at the time of its synthesis is specifically known as 5' to 3' exonuclease activity this kind of activity (must give type of enzyme and direction it works)]
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