A heterozygous pea plant that is tall with yellow seeds, TtYy, isallowed to self-fertilize. Gametes produced?
Cross over is the physical exchange of chromosome pieces. Crossover occurs during which of the following events?

A. Mitosis
B. Meiosis I
C. Meiosis II
D. Both Mitosis and Meiosis I
E. Both Mitosis and Meiosis II

Which of the following statement about double fertilization iscorrect?

A. It occurs in higher plants
B. In double fertilization, one sperm fertilizes the egg, a secondsperm unites with polar cell to produce the endosperm
C. Double fertilization ensures that the endosperm (which uses alarge amount of plant resources) will develop only when an egg cellhas been fertilized
D. all of the above statement is correct
E. All the above statement is incorrect

A true breeding line of green pod pea plants is crossed with atrue-breeding line of yellow pod plants. All of their offspringhave green pods. From this information it can be stated that thegreen color is _____ to the yellow color.
recessive
dominant
subservient
Blended

In a dihybrid cross using Mendelian inheritance, if both parentsare heterozygous for both traits, what will be the phenotypic ratioof their offspring?
3 : 1
1 : 2 : 1
1 : 1
9 : 3 : 3 : 1

The genetic composition of an individual is called its_____________.
phenotype
Genotype

The sex of fruit fly with two XX chromosome and four sets ofautosome will be
Male
Female

1. An animal (called a Box) is diploid, and has 5 types of chromosomes (4 autosomes, 1 pair sex chromosomes). Box sex chromosomes are designated W and Z. Box males are heteromorphic (WZ), and Box females are homomorphic (WW).

Boxes are covered in a thick coat of hair. There is a disease in Box, called hairlessness, that has an inheritance pattern that is W-linked and recessive. The allele used to designate this disease is h. Haired Box are wild-type (allele = h+) and hairless Box are mutant (allele = h). In general (not thinking about Box and hairless) when we say that an inheritance pattern is recessive, we automatically know some things about the genotype of affected/diseased individuals.

A) Is the trait simple, or some other type?

B) Does the presence of one diseased allele cause disease, or are two needed?

C) What other name do we use to describe a heterozygous individual?

In the case of Box and the hairless phenotype, what are all the possible genotypes for a hairless female? What are all the possible genotypes for a hairless male? (You do not need to use complete sentences here)

A heterozygous female is mated with an affected male. Indicate what gametes these two individuals can produce. (You donât need to use complete sentences here)

D) Draw a Punnett square for all the possible offspring that these two Box can create. Place the female gametes across the top of the square, and the male gametes down the left side. Insert a picture of your drawing below.

E) What is the ratio of unaffected to affected female offspring for these parents? For male offspring?

F) Choose one female offspring and one male offspring from the F1 and draw a Punnett Square for a mating between those two individuals (F2). Place the female gametes across the top and the male gametes down the left side. Take a picture of the square and insert it below.