Science Human Gentics Test
Terms
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- How many chromosomes are there in a person's body cells?
- 46
- Each form of a gene is called a?
- allele
- Blood groups are determined by
- multiples alleles
- Which chromosome carries few genes for traits other than gener?
- Y
- An example of a sex linkedtrait is?
- male-pattern baldness
- Why are there more colorblind males than there are colorblind females?
- a female has to inherit 2 recessive genes for colorblindness to be colorblind. A male has to inherit only 1 gene for colorblindness to be colorblind.
- What combination of alleles must a person inherit to have group O blood?
- OO
- The failure of chromosome pairs to seperate during meiosis is called?
- nondisjunction
- The disorder in which the blood does not clot normally is?
- hemophilia
- In amniocentesis
- cells in the fluid surrounding the baby are tested for genetic disorders
- Most differences between identical twins are a result of
- environmental factors
- In down syndrome, there is an extra chromosome on the?
- 21 pair
- Identical twins?
- develop from the same fertilized egg.
- Sex linked traits are carried on the?
- X chromosome
- A chart that shows the relationship among individuals in a family is called a?
- pedigree
- An example of a sex-influenced trait is?
- male-pattern baldness
- Which of the following shows the size, number, and shape of all the chromoses in an organism?
- karyotype
- A pair of alleles that are equally dominant are?
- codominant
- Human blood groups are determine by?
- 3 alleles
- XO is what gender combination of genotypes?
- female
- What gender combination of genotypes is XXY
- male
- What is trisomy-21?
- down syndrome
- Are sex influenced traits carried on the X chromosome? What is the reason why sex influenced traits are expressed differently in males and females?
- No. Men have different hormones than women.