Genetics 1 Flashcards Preview

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Flashcards in Genetics 1 Deck (20):
1

These are the different versions of genes for a single trait.

ALLELES are the different versions of genes for a single trait.

2

This is the 1st generation of a genetics experiment and is composed of Purebred Parents with opposite alleles. (BB x bb)

The P GENERATION is the 1st generation of a genetics experiment and is composed of Purebred Parents with opposite alleles.
(BB x bb)

3

These are physical characteristics that are controlled by genes.

TRAITS are physical characteristics that are controlled by genes.

4

An allele is said to be this if it masks the expression on another allele.

DOMINANT alleles mask the expression of recessive alleles.

5

This generation is composed of hybrid offspring of the P generation.

The F1 GENERATION is composed of hybrid offspring of the P generation.

6

These are segments of DNA that act as instruction for making proteins.

GENES are segments of DNA that act as instructions for making proteins.

7

This is the separation of alleles in a gene pair so that each parent only donates ONE gene to his or her child.

SEGREGATION separates parent alleles so that he or she only donates ONE gene to a child.

8

This is a 'weaker' allele and will not be expressed if paired with a 'stronger' allele.

RECESSIVE alleles are weaker and can be masked by dominant alleles.

9

The genotypes found in this generation are HH, Hh and hh.

The F2 GENERATION has HH, Hh, and hh organisms in it.

10

These organisms that have 2 of the SAME alleles for a single trait.

PUREBREDS are organisms that have 2 of the SAME alleles for a single trait.

11

These organisms carry both a dominant and recessive allele for a single trait.

HYBRIDS are organisms that carry both a dominant and recessive allele for a single trait.

12

The PARENTS of this generation are BOTH HYBRIDS.

The F2 GENERATION is produced by crossing hybrids.

13

This is the physical expression of genes.

A PHENOTYPE is a physical description of a trait.

14

This is a pair, or combination, of genes that controls a trait.

A GENOTYPE is a pair, or combination, of genes that controls a trait.

15

gg, Tt, HH are examples of one of this.

gg, Tt, and HH are all examples of GENOTYPES.

16

Tall, blue eyes, red flowers are examples of this vocabulary word.

PHENOTYPE examples include tall, blue eyes, & red flowers.

17

These are tools that scientists use to predict probable genetic outcomes.

PUNNETT SQUARES predict probable genetic outcomes.

18

This word means two of the very SAME kind of alleles.

HOMOZYGOUS means two of the very same kind of allele.

19

This word means a combination of two DIFFERENT alleles.

HETEROZYGOUS means a combination of two DIFFERENT alleles.

20

These are matching chromosomes that carry genes for the same traits.

HOMOLOGOUS CHROMOSOMES are matching chromosomes that carry genes for the same traits.