Genes and inheritance ch 9

Question 1

gene is The basic unit of heredity passed from parent to child.
Genes are made up of ____________and are arranged, one after another, at specific locations on ___________ in the nucleus of cells.

Answer 1

sequences of DNA
chromosomes

Question 2

human being have ________pairs of chromosome and a copy of maternal and paternal chromosome (___________individual chromosome )
maternal gamete is __________paternal gemete ___________
gamete unite during__________
a child inherits _______ set of chromosome from each parent

in hair its=يرث

in her its

Answer 2

23
46
Egg , sperm
fertillization
one

s pirm

Question 3

meiosis produce __________of chromosome but child inherits _________ copy of each gene

Answer 3

one copy
two copy
cause we go through two chromosome from paternal and maternal the meiosis process needs one seperated copy of each
then child will recieve two

Question 4

the passing on of characteristic from parent to offspring
characterized by ____________

Answer 4

heredity
1-easy to observe
2-selective breeding

Question 5

Single-gene Traits versus multiple-gene trait
examples

Answer 5

single gene example : eye color and earlobe and hairline
mutiple-gene example : height or skin color

Question 6

Early Views on Inheritance :

Answer 6

blended inheritance :
parent’s trait blended in their offspring
experience-dependent inheritance :
Traits of parents became modified throughout their lifetime and these modifed traits were passed on to their offspring

parent’s experiences can lead to changes in gene expression that are encoded in the sperm or egg and passed to offspring

Question 7

phenotype

Answer 7

1-the outward appearance and behavior
of individual
2-the expression of geneotype
example : flower color and height and eye color

Question 8

genotype :

Answer 8

1-the genetic composition of trait
2-the combination of allele
3- individual heterozygous
and homozygous