Inheritance

Question 1

homologous chromosomes

Answer 1

humans have 23 pairs

One pair from the father one from the mother

Question 2

Genotype

Answer 2

Actual genetic makeup relating to a trait

Question 3

Dominant allele

Answer 3

Dominate charactic

Uppercase letter

Question 4

Recessive allele

Answer 4

presence is completely maskes

lowercase letter

Question 5

Phenotype

Answer 5

The physical expression of the genotype

Question 6

inheritance abnormalities occur when ?

Answer 6

Meiosis errors

Question 7

Nondisjunction

Answer 7

Error in cell division resulting in abnormal number of chromosomes

Question 8

Aneuploid

Answer 8

Chromosomes added or missing

Question 9

Polygenic inheritance

Answer 9

Most inherited traits not controlled by one gene

Question 10

Complex inheritance

Answer 10

combined effects of many genes and environmental factors aka skin color, hair color, height, metabolism rate, body build
so even if someone inherits tall gene, full height can only be reached with nutrition ( environmental factor)

Question 11

Skin color

Answer 11

Depends in environmental conditions aka sun exposure and nutrition
3 genes and environment produces actual skin color

Question 12

Karyotype

Answer 12

shows 46 chromosomes
arranged in pairs by size and position
22 pairs are autosomes 
23rd pair are the sec chromosome
XX=female XY=male

Question 13

Sex determination

Answer 13

Males produce sperm carrying an X or Y
Females only produce eggs that carry an X
Sex is determines by which letter, X or Y, the sperm is carrying
At week 7, embryos initiate gender pattern of development