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Chapter 9
PBSC GENES and INHERITANCE - Part 1 BSC1005 259323 CONCEPTS IN BIOLOGY
Question | Answer |
---|---|
The results of a test cross show ALL the offspring with the dominant phenotype. What is the genotype of the unknown parent? | homozygous dominant |
This is the term for the genetic make up of an individual. | Genotype |
If T stands for tall and is dominant, t is recessive and stands for short. If two heterozygotes are crossed, what are the genotypic ratios of the offspring? | 25% TT, 25%tt, 50% Tt |
A gene which is capable of hiding or masking a second gene is known as _____. | Dominant |
Genes code for _____. | proteins |
If T stands for tall and is dominant, t is recessive and stands for short. If two heterozygotes are crossed, what are the phenotypic ratios of the offspring? | 75% Tall, 25% short |
If T stands for tall and is dominant, t is recessive and stands for short. If TT is crossed with tt, what is the genotypic ratio of the offspring? | 100% tall |
This is the term for the physical manifestation of the genotype. | Phenotype |
____________ states that gene pairs are split during meiosis (only one allele can be carried in a single gamete). | Law of Segregation |
Test crosses are always done with a KNOWN ______ . | homozygous recessive |
If T stands for tall and is dominant, t is recessive and stands for short. What is the homozygous recessive genotype? | tt |
If T stands for tall and is dominant, t is recessive and stands for short. What is the heterozygous genotype? | Tt |
A gene which can be hidden or masked by another gene is considered _____. | Recessive |
Two genes which code for the same trait on homologous chromosomes are known as _____ _____. | Gene pairs |
A unit of DNA which codes for a protein. | gene |
What is the proper term for this genotype? tt | Homozygous recessive |
If T stands for tall and is dominant, t is recessive and stands for short. What is the homozygous dominant genotype? | TT |
What is the proper term for this genotype? TT | Homozygous dominant |
What is the proper term for this genotype? Tt | Heterozygous |
Alternative forms of the same gene are known as _____. | Alleles |
The results of a test cross show HALF the offspring with the dominant phenotype and HALF the offspring with the recessive phenotype. What is the genotype of the unknown parent? | Heterozygous |
If T stands for tall and is dominant, t is recessive and stands for short. If TT is crossed with tt, what is the phenotypic ratio of the offspring? | 100% tall |