Beahvioural Genetics

Question 0

What are the basic genetic concepts?

Answer 0

Genes —>

• basic units of heredity
• maintain structural identity from one generation to another
• DNA serves a model for the synthesis of RNA

Question 1

What does studying behavioural genetics include?

Answer 1

Influences on behavioural qualities including:

Personality disposition
Psychological abnormalities
Cognitive and emotional processes

Question 2

What is a gene?

Answer 2

A portion of a chromosome and is composed of deoxyribonucleic acid = DNA

Question 3

What is RNA?

Answer 3

A single strand chemical that synthesis proteins

Question 4

How do proteins determine the development of the body?

Answer 4

• forming part of the structure

- serving as an enzyme that serve as biological catalysts to regulate chemical reaction in the body

Question 5

Who is Greg mendal?

Answer 5

Used sweet pea for his experiment.

• crossed a dominant trait (homozygous) with homozygous recessive=

YY times yy

Question 6

What is the F1 generation?

Answer 6

Yy (heterozygous dominant)

Question 7

What is allele?

Answer 7

One of a number of the same gene for producing characteristics

Question 8

What is homozygous?

Answer 8

For a gene means that a person has an identical pair of genes on the two chromosomes

Question 9

What is heterozygous?

Answer 9

For a gene means that a person had an unmatched pair of genes on the two chromosomes

Question 10

What is a dominant gene?

Answer 10

Shows a strong effect in either the HOMOZYGOUS or HETEROZYGOUS condition

Question 11

What is a recessive gene?

Answer 11

Shows it’s effect only in the HOMOZYGOUS condition

Question 12

What are autosomal genes?

Answer 12

all genes except sex link

Question 13

What are sex linked genes?

Answer 13

Genes located on the sex chromosome

Question 14

In mammals what are sex chromosomes designated at?

Answer 14

Females = XX

Males = XY

Question 15

How many genes does the Y chromosome have for proteins?

Answer 15

27

Question 16

How many genes does the X chromosome have for proteins?

Answer 16

Approx 1500

Question 17

Genes and reproduction

Answer 17

• females contribute X chromosome
• males contribute X or Y this determines sex of child

If an X chromosome is contributed by male = female offspring

If an Y chromosome is contributed by the male = male offspring

Question 18

Selection has multiple of effects on?

Answer 18

Domestication

Question 19

Genes have multiple effects on?

Answer 19

Reverse domestication

Question 20

What is heritability?

Answer 20

The proportion of observed variance in a group of individuals that can be explained or accounted for by genetic variance

Question 21

What are identical twins?

Answer 21

Monozygotic

Single egg fertilises by single sperm then splits into two

• share all genes

Question 22

What are fraternal twins?

Answer 22

Dizygotic

Separated eggs fertilised by separate sperm

• share only about half of genes

Question 23

What is pedigree of homosexuality?

Answer 23

Genetic causes of sexual orientation.