Monohybrid Cross

If Aa is self-crossed, what is the genotypic ratio?

• 1/2Aa:1/2aa

• 1/4AA:1/2Aa:1/4aa

• 3/4AA:1/4aa

• None of the above

An allele (T) for tongue-rolling is dominant over non-tongue rolling. What would be the genotypes of both parents if all of the offspring in the F1 generation are non-tongue rolling?

• TT X Tt

• Tt X tt

• tt X tt

• TT X tt

Tags

NGSS.HS-LS3-1

In garden pea plant, long stem is dominant over short stem. How many percent will be short stem garden pea plants that may appear in the first filial generation if both parents are heterozygous for the given trait?

• 25% short stem pea plant

• 50% short stem pea plant

• 75% short stem pea plant

• 100% short stem pea plant

Which of these gene pairs are heterozygous?

• Aa

• AA

• aa

• Both b and c

Which of these crosses could have a genotypic ratio of 1: 0?

• Dd X Dd

• DD X dd

• DD X Dd

• Dd X dd

What is the other term for homozygous?

Who is the father of genetics?

Round seed plant is dominant over wrinkled. If a hybrid(Rr) is self-pollinated, how many % will be purebred round seed?

Refer to Q8. What is the recessive trait?

What do you call the cross that involves one trait with opposing characters?