Term
T or F
The genotype is the genetic code and the phenotype is the physical expression of genes. |
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Definition
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Term
T or F
some traits are controlled by one gene with more than two alleles |
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Definition
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Term
how many genes control the inheritance of blood type?
How many different alleles are involved? |
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Definition
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Term
| how might you know that a trait is controlled by many genes? |
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Definition
| how many phenotypes you have |
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Term
T or F
Human genes are inherited according to the same principles that Mendell discovered. |
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Definition
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Term
| besides one gene two alleles and one gene three alleles, what is a third pattern of inheritance? |
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Definition
| traits controlled by many genes |
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Term
T or F
traits are determined by dominance or codominance regardless of the number of genes involved. |
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Definition
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Term
T or F
some genes have more than 2 alleles. |
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Definition
| True. doesn't matter amount of alleles |
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Term
| which side geno? which side is pheno? |
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Definition
side with capitals lowercase
geno pheno |
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Term
| why are there more genotypes than phenotypes for blood types? |
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Definition
| because genotypes have more genes |
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Term
| what determines whether a person is male or female? |
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Definition
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Term
| what combinations result in a male and a female? |
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Definition
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Term
| what other role, besides_______1_____, do the sex chromosomes play? |
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Definition
1: determines whether male or female
2: carry genes that determine other traits |
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Term
| How is inheritance different between recessive genes on sex chromosomes and on other chromosomes? |
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Definition
| it is rarer for a female to have a trait than a male |
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Term
| if the man in figure 5 hand an allele A on his X chromosome, who would inherit it? |
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Definition
| daughter (X) because son would be the (Y) chromosome. |
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Term
| how do you know that the sperm cells determine the sex of the child? |
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Definition
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Term
| How can a sex-linked recessive trait be expressed in females? |
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Definition
| the mother and father MUST pass on recessive alleles |
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Term
| Determine the alleles of both parents if there is a 50% chance that either a son or daughter will be colorblind. |
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Definition
father - MUST be color blind
XcY
mother - must be carrier of that trait
XC Xc |
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Term
T or F
all x - linked alleles are expressed in males, even if they are recessive because male have just one X chromosome |
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Definition
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Term
| If the mother is colorblind and the father had normal vision, what is the probability that there sons will be colorblind? |
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Definition
| 100% since daughter depends on mother |
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Term
son depends on_____________
daughter depends on ____________ |
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Definition
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Term
| If the father is colorblind and the mother has normal vision, what is the probability that their daughter will be color blind? |
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Definition
0%: mother is not a carrier
50%: is a carrier |
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Term
| there are two plants. one receives more sunlight than the other and grows taller and fuller. If the two plants have the same genes, what is the difference in how they grow? |
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Definition
| they are exposed to different enviroments |
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Term
| what does the plant example demonstrate about the relationship between genes and environment? |
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Definition
| genes and environments interact to determine characteristics |
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Term
| what are some human traits that are influenced by environments? |
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Definition
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Term
| how does our speech represent the interaction of genetics and environment? |
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Definition
vocal cords and mouth are genetic
language, accent, and dialect are environment |
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Term
| Mary and her mother are both colorblind. is Mary's father colorblind too? How do you know? |
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Definition
| yes because her mom has to be atleast a carrier but her dad MUST be colorblind. |
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Term
T or F
Many of a person's characteristics are determined by an interaction between genes and the environment |
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Definition
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Term
| what are the main ways genetic disorders can occur? |
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Definition
| some genetic disorders are caused are caused by mutations in the DNA of genes. Other disorders are caused by changes in the over all structure of the chromosomes |
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Term
| what causes cystic fibrosis? |
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Definition
| mutation that 3 bases are removed from a DNA molecule |
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Term
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Definition
| mutation that affect the protein hemoglobin |
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Term
| what causes hemophilia? hy is it common in males? |
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Definition
recessive allele on X chromosome
rare for a female to get that |
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Term
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Definition
extra copy of chromosome
trisomy 21 |
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Term
| how could a genetic disorder like cystic fibrosis be cured? |
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Definition
| replacing the gene that causes the disease |
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Term
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Definition
| picture of chromosomes arranged |
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Term
| what type of genetic disorders can be determined by looking at a karyotype? |
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Definition
| disorders resulting from a change in the # of structure of a chrmosome |
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Term
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Definition
| help people understand their chances of passing the genes or traits on to offspring |
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Term
| how do people with genetic disorders deal with them? |
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Definition
| their are treatments for some disorders, and education and training to help live |
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Term
| husband and wife are both carriers (heterozygous) if the couple has 2 kids without cystic fibrosis what chance for other kids? |
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Definition
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Term
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Definition
| chart that tracks which members of a family have a particular trait. |
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Term
| why are pedigrees helpful? |
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Definition
| it allows scientists and genetic counslers to infer how a genetic disorder will be passed on |
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Definition
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