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Year 2 AHW > Genetics > Flashcards

Flashcards in Genetics Deck (14)
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1

What is a genome?

Total set of chromosomes

2

What does diploid mean?

When chromosomes are in pairs

3

What is meiosis?

Gamete formation

4

What is an intron?

Segment of DNA not expressed into mRNA (in to the bin)

5

What is an exon?

Segment of DNA expressed into mRNA

6

What is the term for location of a gene on a chromosome?

Locus

7

What is Mendel's first law?

Two members of a gene pair segregate from each other in the formation of the gamete, half the gamete carry one allele, half the other allele

8

What is Mendel's second law?

Genes for different traits assort independently of one another in the formation of gametes

9

What is a dominant allele?

When there are two alleles, three possible genotypes, but only two phenotypes as if the 'dominant' allele is shown its expressed

10

What is co-dominance?

No allele is dominant to the other, three genotypes, three phenotypes

11

What is epistasis?

The presence of an allele at one locus masks the effect of an allele at a different locus

12

What is inactivation?

One of the X chromosomes becomes inactive in each of all female embryos

13

What are sex linked genes?

When genes are located on sex chromosomes therefore sex of an animal effects expression

14

What are sex influenced genes?

Same genotype different phenotype depending on sex such as presence of Horns