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Genetics Test
Science Chapter 5 Genetics Test
| Question | Answer |
|---|---|
| Neither allele or a trait is | dominant |
| The phenotype produced is ___________ between the two homozygous parents | intermediate |
| More than _____ alleles that control a trait are called multiple alleles | 2 |
| Traits controlled by multiple alleles produce more than three ____________ | phenotypes |
| A group of gene pairs acts together to __________________, which creates more variety in phenotypes | produce a trait |
| Many human traits are controlled by ____________________, such as hair and eye color | polygenic inheritance |
| _________________ are genes that are altered or copied incorrectly. | Mutations |
| A mutation can be harmful, beneficial, or _______________ | have no effect |
| Chromosome disorders are caused by ____________________ than normal | more or fewer chromosomes |
| _____________________ is caused by 3 copies of chromosome 21 | Down Syndrome |
| Both parents have a ____________ allele responsible for the disorder and pass it to their child | recessive |
| Because the parents are _________________, they don't show symptoms of recessive genetic disorders | heterozygous |
| ____________________ is a homozygous recessive disorder | Cystic Fibrosis or Sickle-Cell Anemia |
| Chromosomes that determine the sex of an organism are XX in ____________ | Female |
| Chromosomes that determine the sex of an organism are XY in ____________ | Male |
| Females produce eggs with _______________ only | one x chromosome |
| Males produce sperm with ______________ chromosome | either x or y |
| An allele inherited on an X or Y chromosome is a ______________________ | sex-linked gene |
| _____________________ is a sex-linked disorder caused by a recessive allele on the X chromosome | Color blindness (hemophilia) |
| A _____________ follows a trait through generations of a family | pedigree |
| There are _________ phenotypes of human blood | four |
| Is it possible for two alleles to produce four phenotypes? | No, it's impossible |
| What phenotype is produced by the AA genotype? | A |
| What phenotype is produced by the AO genotype? | A |
| What phenotype is produced by the OO genotype? | O |
| What phenotype is produced by the BB genotype? | B |
| What phenotype is produced by the BO genotype? | B |
| What phenotype is produced by the AB genotype? | AB |
| How many alleles are there for blood type? | 3 alleles |
| When a trait has more than two alleles, how is that trait inherited? | multiple alleles |
| Which blood type is inherited by codominance? | AB because its two alleles are combined and dominant |
| Type of inheritance, "multiple allele" or "polygenic" - A group of genes acts together to produce a single trait | polygenic |
| Type of inheritance, "multiple allele" or "polygenic" - One trait is controlled by more than two alleles of a gene | multiple allele |
| Type of inheritance, "multiple allele" or "polygenic" - Up to six gene pairs may control the color of human skin | polygenic |
| Type of inheritance, "multiple allele" or "polygenic" - The effect of a single allele may be small, but the combination of alleles from many genes produces a wide variety in a trait | polygenic |
| Type of inheritance, "multiple allele" or "polygenic" - Human traits such as eye and hair color, height, and weight are controlled by two or more gene pairs | polygenic |
Created by:
lmcgover