chapter 2.1

Question 1

chromosomes

Answer 1

chromosomes are threadlike structures in the nuclei of cell that contain genetic material

Question 2

what pair of chromosomes is the one that determines the sex of the child

Answer 2

23 rd pair

Question 3

what is the complete set of genes that make up a persons hereditary makeup?

Answer 3

genotype

Question 4

what is the physical, behavioral, and psychological features that result from there interaction between one’s genes and the environment?

Answer 4

phenotype

Question 5

what does dominant gene mean?

Answer 5

the gene that is followed

Question 6

what does recessive mean?

Answer 6

this means the allele is ignored

Question 7

what is it called when an allele doesn’t dominant another completely?

Answer 7

incomplete dominance

Question 8

what are some of the characteristics of someone with sickle cell trait?

Answer 8

a disorder where the individual shows signs of anemia because they have one dominant cell and one recessive cell

Question 9

what is polygenic inheritance

Answer 9

polygenic inheritance is when the phenotype are the result of the combined activity of many separate genes

Question 10

how many chromosomes do we have

Answer 10

46 chromosomes

Question 11

codominance

Answer 11

2 genes influence a trait but each is expressed in the product like a brown(from dad) baby with blonde hair(from mom)

Question 12

what is incomplete dominance?

Answer 12

when the result is a new trait that blends the parents traits like if mom has strait hair, dad has curly hair and baby has wavy hair

Question 13

single gene inheritance is…

Answer 13

one gene from mother and one from father

Question 14

sex-linked traits

Answer 14

these traits are influenced by single genes located on the sex chromosomes mostly located on the x chromosome like colorblindness and baldness

Question 15

teratogens

Answer 15

any disease, drug, or other environmental agent that can cause harm to a developing fetus that can cause congenital malformation

Question 16

what are the principles of teratology

Answer 16

critical period:effect are worse during this time
dosage and duration: the greater and longer exposure causes more serious damage
genetic makeup: susceptibility to harm influence by genetic makeup
specific aspect:
postponed effect: might not be evident at birth but will come up later in life