Inheritence

Question 1

Gene

Answer 1

Sequence of bases in a DNA molecule that codes for a protein

Question 2

Allele

Answer 2

Different version of a gene

Question 3

Genotype

Answer 3

The genetic constitution of an organism

Question 4

Phenotype

Answer 4

Expression of the genetic constitution and its interaction with the environment

Question 5

Dominant

Answer 5

Allele whose characteristic appears in the phenotype

Question 6

Recessive

Answer 6

Allele whose characteristic is only present in the phenotype when two copies are present

Question 7

Codominent

Answer 7

Alleles that are both expressed in the phenotype

Question 8

Locus

Answer 8

Fixed position of a gene on a chromosome

Question 9

Homozygote

Answer 9

Organism that carries two copies of the same allele

Question 10

Heterozygote

Answer 10

Organism that carries two different alleles

Question 11

Carrier

Answer 11

A person carrying an allele which is not expressed in the phenotype but that can be passed on to offspring

Question 12

What are autosomal genes

Answer 12

Genes that aren’t linked to see chromosomes

Question 13

Genes on the same autosome are

Answer 13

Linked

Question 14

Why are autosomes linked

Answer 14

They stay together during the independent segregation of chromosomes and their alleles will be passed on to the offspring together

Question 15

Why can autosomal genes not be passed on

Answer 15

Crossing over splits them before independent segregation occurs

Question 16

The closer the genes are on the autosome,

Answer 16

The more closely they are linked because crossing over is less likely to split them up

Question 17

What is epistasis

Answer 17

The allele of one gene masks the expression of the alleles of other genes