week 6

Question 1

sex chromosomes

Answer 1

determine whether an individual is male or female

Question 2

autosomes

Answer 2

remaining non sex chromosomes in the nucleus

Question 3

karyotype

Answer 3

photograph of chromosomes of an actively dividing cells showing the number shape and size of the chromosomes

Question 4

Turner syndrome

Answer 4

• is it missing the other x chromosome
• short stature, infertility are most common
• webbed neck, wide chest are possible

Question 5

Down syndrome

Answer 5

trisomy 21

• mild to moderate mental deficiency
• almond shaped eyes
• protruding tongue
• poor muscle tone
• shorter limbs, and neck

Question 6

klinefleiter syndrome

Answer 6

extra X chromosomes

• sterile with small testes
• low levels of testosterone in blood
• some learning disabilities may be present

Question 7

pedigree chart

Answer 7

diagram that shows the the occurrence of phenotypic traits or genetic diseases in successive generations usually in humans; enable the analysis of how these traits are passed from parents to offspring

Question 8

carrier

Answer 8

refers to an individual who has the recessive allele for a condition or disease but does not express any symptoms of the condition or disease

Question 9

polygenic

Answer 9

phenotypic traits that involve contributors from the alleles of several or many genes at multiple locations on chromosomes; typically with an additive effect

Question 10

recombinant

Answer 10

DNA molecule carryng genes derived from two or more sources