Inheritance and Traits Flashcards
What is dominant and what is recessive?
What does it mean to be a carrier
T or F : To have a recessive visible trait, you must have two copies of that gene. To have a dominant, you only need one dominant
True
there is no universal mechanism by which dominant and recessive alleles act. T or F
True. There is a lot of unpredictability about it and we are still learning.
T or F : dominant allele + dominant allele = dominant phenotype
dominant allele + recessive allele = dominant phenotype
recessive allele + recessive allele = recessive phenotype
This is correct. It’s true!
T or F. Dominant phenotypes are more common than recessive phenotypes
False. Not always. A population with a lot of light colored eyes for example is common in places like Scandinavia.
Dominant or Recessive genes are not better than the other. T or F
True. One is not better than the other.
What is a broken allele?
An allele that doesn’t work properly
The environment does not affect genetics, traits
F: height, tongue rolling, etc. can be affected by environment as well as hereditary traits.
Dimples are considered an “irregular” dominant trait
True
Freckles are controlled primarily by the MC1R gene.
True
What is an allele
Different forms of a gene, which produce variations in a genetically inherited trait. (Different alleles produce different hair colors—brown, blond, red, black, etc.)
What are genes?
Genes are parts of DNA and carry hereditary information passed from parents to children. Genes contain blue‐print for each individual for her or his specific traits.
What is dominant?
Dominant version (allele) of a gene shows its specific trait even if only one parent passed the gene to the child.When a child inherits dominant brown‐hair gene form (allele) from dad, the child will have brown hair.
What is recessive?
Recessive gene shows its specific trait when both parents pass the gene to the child.
When a child inherits recessive blue‐eye gene form (allele) from both mom and dad, the child will have blue eyes.
What is homozygous?
Two of the same form of a gene—one from mom and the other from dad.Inheriting the same blue eye gene form from both parents result in a homozygous gene
what are heterzygous?
Two different forms of a gene—one from mom and the other from dad are different.
What is a genotype?
Internal heredity information that contain genetic code.