Question

Hello,

I just need someone to check my answer:

The answer I choose are in bold points.

1. What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?

Recessive genes occur more frequently in the F1 generation than do dominant ones

Traits are inherited in discrete units, and are not the results of "blending"

There is considerable genetic variation in garden peas

Genes are composed of DNA

2. In a particular plant, two genes control leaf shape and color.

Round leaves (R) are dominant to jagged leaves (r).

Yellow fruits (Y) are dominant to white fruits (y).

A true-breeding roundleaved, yellow-fruited plant is mated with a jagged-leaved, white-fruited plant.

What are the genotypes of the plants involved in this cross?

cannot determine from the information given

RRYY x RRYY

RrYy x RrYy

RRYY x rryy

3. What fraction of the offspring of the cross AaBb × AaBb would show the dominant phenotypes for both genes, assuming that they are on different chromosomes?

12∕16

3∕16

9∕16

6∕16

4. Radish flowers may be red, pink, or white.

A cross between a red-flowered plant and a whiteflowered plant yields all-pink offspring.

The part of the radish we eat may be oval or long, with long being the dominant characteristic.

The flower color trait in radishes is an example of which of the following?

Incomplete dominance

Epistasis

Pleiotropy

Codominance

5. The ABO blood groups in humans are determined by a multiple allelic system in which IA and IB are codominant and are dominant to i.

If an infant born to a type O mother is also type O, possible phenotypes for the father are _____________________.

Group of answer choices

O or A

O only

O, A, or B

Impossible to determine

6. The frequency of a recessive lethal allele is more common in the human population than the frequency of a dominant lethal allele because _____________________.

inheriting a single recessive lethal allele does not cause death, whereas inheriting a single dominant lethal allele does often cause death.

the recessive lethal allele can be passed on from generation to generation in heterozygous individuals with normal phenotype reaching reproductive age, whereas the dominant lethal allele often causes death of the individual before they can mature and reproduce.

Both answers are correct

Neither answer is correct

Answer 1