The number of chromosomes in Klinefelter's syndrome are :
47
46
45
44
A.
47
Klinefelter's syndrome is a chromosomal condition in males that can affect physical and intellectual development. These individuals have 47 chromosomes, i.e. 44 + XXY. Such individuals are sterile with undeveloped testes, sparse body hair, mental retardation, long limbs and some female characters.
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
Sex determination in humans takes place by
sex chromosomes of father
measurement of sperm
measurement of ovum
sex chromosomes of mother
