SCIENCE QUIZ 2
The nucleus of each cell in the human body contains ? chromosomes from each parent.
23
If an organism has 6 haploid chromosomes, how many chromosomes are present?
6
The Y chromosome in human males:
appears to be genetically almost inactive
What is meant by homologous chromosomes?
the gene's alleles are found in matched chromosome pairs
A scientific law requires that all observations and experiments verify the theory
true
All members of each species have the same number of chromosomes
true
The chromosome number of a human female 44 + XX; of a male, 44 + XY.
true
As a result of nondisjunction, a female gamete may contain :
two sex chromosomes, and no sex chromosomes
All ova contains sex chromosomes corresponding to:
X
The alternative form of a gene controlling a given characteristic is called:
an allele
Within a set of human chromosomes, 22 pairs are called:
autosomes
"Linkage" refers to genes for different traits
being located on the same chromosome
The sex of the offspring is determined:
by the combination of the sex chromosomes of the male and female
Fertilization produces in the offspring:
double the haploid number of chromosomes
When the alleles of a gene pair are identical they are said to be:
homozygous
Segregation and independent assortment of genetic material occurs during:
meiosis
The ratio of the offspring of 9:3:3:1 is for the:
phenotype
If the male parent has the genotype AA and the female parent has the genotype as, offspring's genotype will be:
Aa