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