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Both parents are heterozygous widows peak is dominant over straight hair what kind of hairline would offspring have?
Wiki User
∙ 14y ago
A dihybrid cross for the parental generation would look as follows:
A a
A AA Aa
a Aa aa
Indicating three different genotypes, AA, Aa and aa. These three genotypes would be expressed in two phenotypes: 75% of offspring would express the dominant widow's peak (AA and Aa), while 25% of offspring would express the recessive straight hairline (aa).
Wiki User
∙ 14y ago
Wiki User
∙ 14y ago25% if homozygous means that the male has the dominant and recessive trait. If it means he has both dominant, then it's 50%
Wiki User
∙ 14y agoThere is no chance of that happening. In other words, it is a 0% chance, based on a basic Punnett Square.
hope i helped! :)
Wiki User
∙ 12y agoThis is homework. Wiki won't help you cheat. Get to work.
Wiki User
∙ 12y ago25 percent.
Wiki User
∙ 12y ago25%
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In humans straight toes S is dominant over curled toes s What would be the result of a cross between a recessive male and a heterozygous female?
The resulting offspring will have 50% chance of having straight toes and being heterozygous, and 50% chance of having curled toes and being recessive.
Why are a window's peak considered a single gene trait?
A widow's peak is a dominant trait, so even if a person has both the widow's peak and the straight hairline trait, only the widow's peak will be visibly apparent.
What term describes an organism with two different alleles for a trait?
Heterozygous, or hybrid. This being because a heterozygous and a hybrid mean that they phenotype consists of two different genes. For example straight hair is dominant to curly hair, S being straight and s being curly. Some people may have SS, meaning they have straight hair, and others may have ss, meaning they have color hair. But in some cases, some people would have Ss making them heterozygous. SS or ss would be homozygous.
In incomplete dominance genotypes can be expected to appear in a ratio of?
The expected phenotype for a Mendal F1 monohybrid cross is 3:1. Looking at heterozygous parents (F1) who share the same dominant trait, e.g. Straight tail.Crossing two heterozygous parents from the F1 generation results in an F2 generation that produces a 75% chance for the appearance of the dominant phenotype, of which two-thirds are heterozygous, and a 25% chance for the appearance of the recessive phenotype, giving the ratio 3;1.Inheritance pattern of dominant and recessive phenotypes when each parent is homozygous for either the dominant or recessive trait. All members of the F1generation are heterozygous and share the same dominant phenotype, while the F2generation exhibits a 3:1 ratio of dominant to recessive phenotypes.
What is the man's genotype?
The man's genotype is CcFf. The woman's genotype is CcFf. These genotypes only apply if curly hair is dominant to straight hair. Freckles is dominant to no freckles. Also if a man who is heterozygous for both curly hair and freckles who then marries a woman with the same genotype.
In humans widow's peak (W) is dominant over straight hairline (w). If a heterozygous male marries a female with a straight hairline what percent of their children can be expected to have widow's peak?
50% of their children are expected to have a widow's peak. When a heterozygous male (Ww) with a widow's peak gene marries a female with a straight hairline (ww), their offspring have a 50% chance of inheriting the widow's peak gene from the father.
In humans widows peak w is dominant over straight hairline w if a heterozygous male marries a female with a straight hairline what percent of their children can be expected to have a widows peak?
According to Mendelian genetics, if the male is heterozygous for the widows peak trait (Ww) and the female has a straight hairline (ww), 50% of their children are expected to have a widows peak (Ww) and the remaining 50% of their children are expected to have a straight hairline (ww).
When a straight thumbed homozygous person has offspring with a hitchhiker's thumbed homozygous person the offspring will have which trait?
Straight thumbs, hitch hiker's thumb is recessive...so the F1 generation in this example would be heterozygous and have the dominant (straight thumbed) phenotype.
In humans straight toes S is dominant over curled toes s What would be the result of a cross between a recessive male and a heterozygous female?
The resulting offspring will have 50% chance of having straight toes and being heterozygous, and 50% chance of having curled toes and being recessive.
Could 2 people with a widows peak have a child with a straight hairline and could 2 people with a straight hairline have a child with a widows peak EXPLAIN?
Yes to the first one, no to the second one. Firstly, widow's peak is caused by a dominant gene while a straight hairline is caused by a recessive gene. Let 'H' be dominant and 'h' be recessive. So for a dominant gene, the trait still will be expressed whether the genotype of the person is homozygous dominant(HH) or heterozygous(Hh). For a recessive gene however, the trait will only be expressed when the genotype of the person is homozygous recessive (hh). So two people with a widow's peak CAN have a child with a stright hairline, provided both of their genotypes are Hh. This is because by crossing their genotypes, they can have a possibility of having child with the genotype HH(widow's peak), Hh(widow's peak), and also hh(straight hairline). The ratio of these three possibilities however, are 1:2:1. So the odds of having a child with a straight hairline in this case is 1:3. If the two people who have widow's peak have the genotype HH or one of them HH and the other Hh, then the possibility of having a child with a straight hairline is 0. This is because by crossing their genotypes together, the genotype of the child will either be HH for the first case, and HH or Hh for the second case. For two people who have a straight hairline, the genotype of both will definitely be homozygous recessive (hh), thus child will definitely have the recessive gene. Therefore, it is not possible for two people with straight hairline to have a child with widow's peak.
Why are a window's peak considered a single gene trait?
A widow's peak is a dominant trait, so even if a person has both the widow's peak and the straight hairline trait, only the widow's peak will be visibly apparent.
How many people in the world have a straight hairline?
It is difficult to provide an exact number, but straight hairlines are less common compared to other types of hairlines such as widow's peak or receding. Straight hairlines are considered a genetic trait and can vary in prevalence based on ethnic backgrounds and individual genetics.
If AA is dominant for a widow's peak and if a child is born without a widow's peak what is his phenotype?
The Phenotype would be a straight hairline. The genotype would be aa.
Can someone give you a List of dominant or recessive personality traits?
1. Shape of face (probably polygenic) Oval dominant, square recessive 2. Cleft in chin No cleft dominant, cleft recessive 3. Hair curl (probably polygenic) Assume incomplete dominance Curly: homozygous Wavy: heterozygous Straight: homozygous 4. Hairline Widow peak dominant, straight hairline recessive 5. Eyebrow size Broad dominant, slender recessive 6. Eyebrow shape Separated dominant, joined recessive 7. Eyelash length Long dominant, short recessive 8. Dimples Dimples dominant, no dimples recessive 9. Earlobes Free lobe dominant, attached recessive 10. Eye shape Almond dominant, round recessive 11. Freckles Freckles dominant, no freckles recessive 12. Tongue rolling Roller dominant, nonroller recessive 13. Tongue folding Inability dominant, ability recessive 14. Finger mid-digital hair Hair dominant, no hair recessive 15. Hitch-hiker's thumb Straight thumb dominant, hitch-hiker thumb recessive 16. Bent little finger Bent dominant, straight recessive 17. Interlaced fingers Left thumb over right dominant, right over left recessive 18. Hair on back of hand Hair dominant, no hair recessive 19. Tendons of Palmar Muscle Two tendons dominant, three tendons recessive
What term describes an organism with two different alleles for a trait?
Heterozygous, or hybrid. This being because a heterozygous and a hybrid mean that they phenotype consists of two different genes. For example straight hair is dominant to curly hair, S being straight and s being curly. Some people may have SS, meaning they have straight hair, and others may have ss, meaning they have color hair. But in some cases, some people would have Ss making them heterozygous. SS or ss would be homozygous.
In incomplete dominance genotypes can be expected to appear in a ratio of?
The expected phenotype for a Mendal F1 monohybrid cross is 3:1. Looking at heterozygous parents (F1) who share the same dominant trait, e.g. Straight tail.Crossing two heterozygous parents from the F1 generation results in an F2 generation that produces a 75% chance for the appearance of the dominant phenotype, of which two-thirds are heterozygous, and a 25% chance for the appearance of the recessive phenotype, giving the ratio 3;1.Inheritance pattern of dominant and recessive phenotypes when each parent is homozygous for either the dominant or recessive trait. All members of the F1generation are heterozygous and share the same dominant phenotype, while the F2generation exhibits a 3:1 ratio of dominant to recessive phenotypes.
Can two people with nappy hair make a straight hair child?
It is possible. If both of the parents are heterozygous, they have a gene for straight hair in them, it just means that "nappy" hair is the dominant allele. Then the recessive alleles is straight hair, then there is a 1 in 4 chance of a baby with straight hair.
