Question

Il. Define and give examples of Chromosomes (how many are in normal human somatic cells, how many in gametes?) Karyotype Describe the karyotypes of normal male, normal female, Down syndrome, Turners Syndrome and Klinefelter's Syndrome Define "autosomes" and "sex chromosomes" Define and give an example: A. Gene B. Allele C. Dominant Allele D. Recessive Allele E. Incomplete mode of inheritance F. Co-dominant alleles G. Sex-inked genes

Answer 1

Chromosome in somatic cells = 46
gametes = 23

karyotype
Normal male has 46 chromosome = 46,XY
Normal female has 46 chromosome = 46,XX
Down syndrome has 47 chromosome = 46, XY, 21
Turners syndrome has 45 chromosome = 45, XO
klinefelter syndrome has 47chromosome = 47, XXY

Autosomes are not involves in sex determining chromosome mostly control normal process of the cell.

Sex chromosome are involves in sex determining chromosome.

Gene - A heritable factor that controls a specific characteristic.

Alleles - are different forms of a specific gene.

Dominant Allele - An allele whose trait always shows up in the organism when the allele is present.

Recessive Allele - An allele that is masked when a dominant allele is present

Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele.

Codominance occurs when multiple alleles are expressed at the same time.

Sex linked genes are genes that are in the sex chromosomes and that are therefore inherited differently between males and females.