Turner's syndrome chromosome pattern is:
XO
XXX
XYY
XXY
A.
XO
Turner's Syndrome is a chromosomal condition that mainly affects development in females. It is a monosomic condition with 44 + XO genotype. It occurs by the union of an abnormal egg and normal sperm or vice versa. These are sterile females with rudimentary ovaries, underdeveloped breasts, small uterus, short stature and mental retardation.
Sex determination in humans takes place by
sex chromosomes of father
measurement of sperm
measurement of ovum
sex chromosomes of mother
The main cause of Edward syndrome, Patau syndrome and Down syndrome is :
mutation of gene
change in both autosomes and heterosomes
change in autosomes
change in heterosomes
When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the F1 generation consists of tall plants with rounded seeds. How many types of gametes an F1 plant would produce ?
One
Three
Four
Eight
Crossing over in diploid organisms is responsible for
dominance of genes
linkage between genes
recombination of linked genes
segregation of alleles
