Genetics Part 2 (Silva 1406)

_____________ is the branch of biology that studies heredity

Heredity is the passing on of characteristics from parent to offspring.

Genetics

The Punnett Square is a device used to determine the F1 possibilities.

A diagram used in the study of inheritance to show the results of random fertilization

A device used to predict probable outcomes of a specific genetic cross.

True

Dominant traits are represented by a lower case letter in a Punnett Square.

False

The Genotype Ratio is the

Ratio of homozygous dominant F1 to the number of heterozygous F1 to the number of homozygous F1.

Monohybrid crosses are problems that deal with one trait that has complete dominance in the F1's.

True

In humans there are 46 pairs of chromosomes for a total of 23 in every cell with the exception of the gametes or eggs and sperm that are found in sexually mature individuals.

False

Chromosomes _____ through____ are called somatic chromosomes and contain the genes that produce body traits.

1 through 22

A Karyotype is

a chart that lists chromosomes from largest to smallest.

A Dihybrid cross is solved the same way a as a monohybrid cross, except for when the legend is developed there are _____ letters.

two

In a DiHybrid cross there will be four possible combinations of gametes for each parent and 16 possible F1 genotype.

true

The observable or detectable trait of an individual that arises from the interactions between genes is known as an individuals _____________.

Phenotype

When cresting a Punnett Square or dihybrid cross, you will use the first letter of the dominant gene or allele, capitalize it for the dominant gene and use the same letter, but lower case for the recessive gene.

True

The _________ trait pertains to an allele that is not phenotypically expressed in the presence of the________ allele.

Recessive, Dominant

Gregor Mendel is known as the father of genetics. Mendel was the first person to successfully predict how traits are transferred from one generation to the next through carefully controlled experiments using garden pea plants.

True

The organism is ________ for a specific trait when the pair of alleles are different.

Heterozygous

The _____ _______ is the location of a gene along the length of a chromosome

Gene Locus

A man with type O blood could be the father of a child with type B blood if the mother had type A blood.

False

An ________ is an alternate version of a gene and is located at a given gene locus on a chromosome.

Allele

When both the dominant and the recessive alleles are expressed in the F1's this is known as ___________.

Co-Dominance

When forming a legend for a a punnett square, considering that free earlobes are dominant over attached earlobes, what would Homozygous dominant look like in the legend?

FF