Chapter 4 review Patterns of Heredity

Who is the father of Heredity? Gregor Mendel

What type of plants did Mendle work with? Pea Plants

What do genes tell us? Our inherited traits

What are alleles? The various forms of the same gene.

What is a phenotype? It describes the actual characteristics that can be observed - like height.

What is a genotype? Is the name of the genes an organism has.

When do dominate or recessive genes show up? Dominant traits are expressed even if only one copy of the allele codes for them. (Dd) If a trait is recessive, it is expressed only if both alleles code for it (dd).

What is it called when a gamete for each parent combines to form a new cell? Sexual reproduction

If an allele is expressed at Dd is it dominate or recessive? dominate

What does a Punnet Square show? It is a representation of how alleles might combine

What are the chances that a human offspring will have an XY genotype? 50% or a ratio of 1:2

How many chromosomes do you have? 46

If a 2n human cell has 46 chromosomes, how many chromosomes does a male gamate have? 23

My holiday gift to you… No, not an ipod No, not a iphone Yes, a take home test!